Research

Jul 22 2019

The science behind a bird fallout…there’s an app for that!!!

Author: DakotaBirder • Discussion: No Comments

Birding the Sioux Falls area in April and the first half of May was…sloooooooooooooowwwww. With the late cold weather and snow, and continued wet spring precipitation, there was certainly plenty of water around (and there still is). But shorebirds were very slow all spring near Sioux Falls (perhaps just spread out?). Sparrow migration was utterly spectacular in April, but other songbirds? Once the sparrows left, it seemed like there weren’t any other songbirds filling the void. Certainly not warblers, which were few and far between for much of May. With the South Dakota Ornithologist’s Union (SDOU) meeting in Brandon on May 17-19, and with an incredibly wet forecast, the prognosis for good birding wasn’t great.

And then a funny thing happened…songbird migration ended up being utterly spectacular that weekend. The birds seemed to have arrived overnight, with warblers galore, and plenty of other songbirds as well. I personally had a 20-warbler day that Saturday (the 18th), and that’s with me whiffing on a few species that others saw in the area. It was one of the best, if not the best, warbler and songbird days I’ve had here in the 20 years I’ve been birding.

So what happened? As a scientist, I say LET’S CHECK THE SCIENCE behind it! You know how they say “There’s an app for that?” Well there’s also typically a scientific explanation behind…everything, if you look hard enough. That’s certainly true in this case.

For one, let’s check the weather radar for the overnight period from Friday, May 17th through Saturday May 18th. The weather that Friday was cloudy and rainy, driven by a low pressure system and a slowly moving front moving northeastward out of Nebraska. With the system predicted to generally stall over our area for the weekend, the forecast was bleak.

May 17th, 2019 - Weather Map
Weather map on 6:00AM (CST) on Friday, May 17th, showing a stalled to slowly moving stationary front just to our south. The forecast was for the low pressure system in Colorado to slowly move northeastward, bring showers and thunderstorms to the region for Friday night and into the weekend.

The weather system did move northeasterly through the afternoon and evening, triggering storms both along the trailing warm front to the south through Nebraska and Kansas, as well as more unsettled weather wrapping around the low pressure system. Moderate to strong northeasterly winds were found behind the low pressure system, but in front of the low were southerly and southeasterly winds…including in the area around Sioux Falls. It took until daybreak for the low pressure system to reach the Sioux Falls area, basically sitting directly over the region. But from the previous evening through daybreak on May 18th, an area from Sioux Falls, southward into extreme eastern Nebraska and all of Iowa and Minnesota were subject to south and southeasterly winds.

Surface weather map at 6:00 AM CST, showing the low sitting almost directly over Sioux Falls. But all night long, the counter-clockwise winds around the low funneled southerly and southeasterly winds through an area from far eastern South Dakota, and eastward into Iowa and Minnesota.

Given how slow the migration had been all spring long, the birds had to be…somewhere. But where? How could science have explained the fallout of warblers and other birds that weekend? The weather map and the southeasterly winds provide one clue, but the other is provided by weather radar itself. Since the 1950s, it’s been understood that weather radar could potentially identify features in the sky other than the weather…and that includes birds. There’s even a term for it now…Radar Aeroecology. A 1956 paper by Bonham and Blake discussed the radar echoes provided by both birds and flying insects. While research continued in the decades since, it’s only recently that the information has been made available for a birder’s benefit.

The animated map below shows national-scale radar returns for the night of May 17th. The advancing low and front, and associated precipitation, can be seen as it moves out of Colorado, through Nebraska and into South Dakota. But what of the radar returns in the eastern half of the country? Those are birds…birds taking flight just after sunset to resume their spring migration northward. You can identify the “bloom” around each radar location shortly after sunset, with the blooms appearing east to west as the sun sets. Where are the heaviest migration “blooms”? Look at the radars lighting up after sunset in the Midwest…St. Louis…Des Moines…other radars in Missouri, Illinois, and Iowa depicting heavy densities of birds taking flight.

Radar loop from approximately 6:00 PM (CST) Friday, May 17th, 2019 through 6:00 AM Saturday, May 18th, 2019. The areas south and east of Sioux Falls show a clear, very strong signal representing heavy migration of birds taking flight that evening.

But how can we translate those radar echos to where the birds are moving? In recent years, Cornell University, in partnership with multiple academic institutions, have developed “BirdCast“. They have developed algorithms that use weather radar returns to quantify the density of birds, while using short-term weather forecasts to project likely movements. The resultant “BirdCast” provides a 1- to 3-day look on likely bird migration hotspots.

The animated map below provides a depiction of estimated bird migration traffic that night. Ahead of the advancing front, southerly and southeasterly winds were favorable for migration, particularly as large densities of birds were already stacked up from the previous days and weeks. Sioux Falls was on the western edge of this migration hotspot, a beneficiary of favorable weather patterns bringing in birds from Missouri, Iowa, and Minnesota.

Birdcast depiction of migration traffic rate (bird density) and directional movements, from about 6:00 pm Friday, May 17th, through 6:00 AM Saturday, May 18th. with northerly winds and lower bird densities in the western Great Plains, very little bird movement is noted. However, ahead of the advancing front, extremely high migration densities are noted from Missouri, Illinois, and Iowa radar sites, with southeasterly winds pushing them northwestward…towards Sioux Falls. The solid lines represent the advancing sunset (red) and sunrise (yellow).

The map below depicts the situation that occurred throughout much of the first half of May. Prevailing weather patterns and storms, along with the cool weather, kept birds stacked up to our south and east, with a very slow spring migration to this point in South Dakota. The week prior to the big Sioux Falls fallout, birds were so far south that the Houston area birders declared a “Lights Out” period from May 9th-12th to avoid confusing the mass of migrating birds. But they had a long ways to go to get to South Dakota.

Houston Audubon "Lights Out" for May 9-12
Image from the Houston Audubon site, calling for a “lights out” period from May 9th to 12th. Heavy migrations were predicted the week before the Sioux Falls fallout…but FAR to our south and east.

The result of the changing weather pattern…an absolutely spectacular weekend of birding in the Sioux Falls area the weekend of May 17-19, particularly as the forecast deluge mostly fizzled out. I admit that even I as a scientist was somewhat skeptical of the Cornell BirdCasts. But after the events of that weekend, count me as a firm believer!

Here are some photos of the spectacular birds of that weekend:

Scarlet Tanager - Piranga olivacea
Scarlet Tanager – May 18th, 2019 Good Earth State Park, South Dakota
Magnolia Warbler - Setophaga magnolia
Magnolia Warbler – May 18th, 2019 – Good Earth State Park, South Dakota
Henslow's Sparrow - Ammodramus henslowii
Henslow’s Sparrow – May 19th, 2019 – Newton Hills State Park, South Dakota. Great weekend of birding overall, AND a lifer? I’ll take it.
Great Crested Flycatcher - Myiarchus crinitus
Great Crested Flycatcher – May 18th, 2019 – Good Earth State Park, South Dakota. Flycatchers in general seemed almost non-existent, prior to this weekend.
Mourning Warbler May 18th, 2019 Good Earth State Park, South Dakota. Not a great photo, but Mourning Warblers are a species I see occasionally, some springs. On May 18th, I ran into probably a dozen at Good Earth State Park.
Jul 22 2019

Add your biodiversity sightings to “iNaturalist” – Big Sioux Rec Area, Beaver Creek Nature Area

Author: DakotaBirder • Discussion: No Comments
Banner page for a new iNaturalist “project” page, “Biodiversity of Beaver Creek Nature Area”. You can enter sightings of any form of life you find in the park boundaries, and iNaturalist will summarize those observations and provide an accounting of all life observed there.

Twitter is a dangerous thing for me. I’m relatively new to it, starting 2 years ago. But it’s rather addictive, and if I don’t curb myself I can spend far too much time on it. The good news…this weekend I spent very little time on Twitter, even going (gasp!) almost 36 hours without even looking at it. The bad news…it’s because Twitter itself got me hooked on another online activity.

When visiting the Black Hills a week ago, I took a number of flower and butterfly photos. I don’t really “do” butterflies and flowers, so didn’t know the ID of most, so I posted some blocks of photos on Twitter. People did help with ID, but I also got multiple suggestions to join iNaturalist. Now, I have done eBird for years, and greatly enjoy recording all of my bird sightings. iNaturalist is similar but expanded to…everything…all life that you wish to record, be it a bird, a reptile, a tree, a shrub, a bug, a fungi…anything. But unlike eBird, where you’re expected to know the species you’re entering, iNaturalist is also a platform for helping you to identify your finds. You upload a photo, identify as best you can, and other people confirm your identification, or offer a corrected identification. There’s a system in place where the “grade” for your entry depends upon matching IDs, with “Research Grade” ranking given to entries that have confirmed IDs from multiple users.

I have many, many thousands of photos over the years, mostly birds, but also other critters. I also have occasionally taken photos of flowers, fungi, and other life, but haven’t really given an ID to most. So instead of wasting time on Twitter this weekend, I spent FAR too much time entering old photos onto iNaturalist.

One feature I think is really cool about iNaturalist is that you can set up your own “project”. Your project can define an area where you can summarize observations. You can also select what taxa are part of your project. So for example, you could set up a project for your favorite birding spot, and do something like “The Birds of Newton Hills”. iNaturalist would then record ANY sighting of a bird, be it by yourself, or someone else, and summarize all the sightings of birds for that area. It’s all automated in that once the project is set up, it automatically records the sightings any one makes within your defined parameters (area, type of life, time of observation, etc.).

A cool concept! And since I admittedly get a little fatigued with bird photography, from the standpoint of taking photos of the “same old birds” (how many American Goldfinch photos do you need?), and since we live right across the street from the Big Sioux Recreation Area, I thought why not start an iNaturalist project that records ALL life in the park? And so that’s what I’ve done, with a new iNaturalist project “Biodiversity of the Big Sioux Recreation Area“. My other most visited birding location is Beaver Creek Nature Area, just 4 miles east of where I live. I started another project for Beaver Creek, “Biodiversity of Beaver Creek Nature Area“.

Join in if you’d like! If you ever visit either the Big Sioux Recreation Area or Beaver Creek Nature Area, just start taking photos of the plants, animals, fungi…whatever life you run across in those two parks. Join iNaturalist and record your sightings. You do need a photo, and you do need to include the location of the sighting. That’s easy if you use your cell phone for the photo (or if your camera has GPS), as the location will be automatically recorded when you take the photo, and uploaded automatically when you add the photo to iNaturalist. And…that’s it! If the sighting is recorded within the boundaries of those two parks, it will automatically be added to these “projects”.

And don’t worry if you don’t know the identification of the plant or animal! That’s the point of iNaturalist. It will offer an initial suggestion based on your photo (most of the time the suggestions are very good!), and others will chime in and offer their 2 cents on ID.

I don’t need another online hobby, but…this one is a bit different! Not only did I end up starting these two iNaturalist “projects” this weekend, but each day I ended up taking long walks through the Big Sioux Recreation Area, going very slowly, and taking photos of a lot of the plants and insects I came across. It’s an online time sucker, but…it’s also an exercise routine in a way! So it all balances out. 🙂

Give it a try and start entering your sightings! But beware, it’s fun, but a bit addictive. Here are the links again to the two iNaturalist projects I set up:

Biodiversity of the Big Sioux Recreation Area

Biodiversity of Beaver Creek Nature Area

Jul 30 2018

Small minds, and POOF, a S.Dakota science institution is gone

Author: DakotaBirder • Discussion: 3 Comments

South Dakota State University - Geospatial Sciences Center of ExcellenceSmall minds, insular thinking.  It’s an infection that’s spread across the United States in the last several years, and one victim of the “disease” is the death of one of the most successful science programs of its kind in the entire world.

In 2016, Barry Dunn became president of South Dakota State University. One thing he did when arriving was review the state of the “Geospatial Sciences Center of Excellence” (GSCE)…a truly WORLD-renown science center established in 2005 to develop and apply remote sensing and other geospatial data for research and education purposes. Some of the biggest names in the field were lured to South Dakota State.  In the last 13 years, Mike Wimberly…Matt Hansen…David Roy…Geoffrey Hennebry…Mark Cochrane…all were key parts of GSCE and its development.  Over the last 13 years, they’ve had a massive impact on the field, applying remote sensing data and analysis techniques to applications that include understanding disease vectors and risks of West Nile virus…helping to establish and use the next generation of satellite sensors…mapping fire extent and severity…mapping changes in our ever-declining grassland ecosystems…and many, many more.

Students from all over the world moved to South Dakota, of all places, to work with such a wonderful collection of researchers.  The research impact has been enormous.  The reputation is sterling.  The senior scientists at GSCE brought in huge amounts of external research dollars. It has been, by all logical measures, a raging success.

It’s now decimated. During his review process, Barry Dunn in his infinite wisdom decreed SDSU GSCE wasn’t of any benefit to South Dakota, partially because 1) it didn’t do all its work IN South Dakota, and 2) it didn’t have enough South Dakota students. So, they cut $1 million in core funding. They effectively gave the research leads a 25% pay cut.  The result of the drop of support?  For the next semester that starts in a few weeks, literally NONE of the GSCE Senior Scientists will remain.  That’s right…ALL have decided enough is enough, and all are moving on to greener pastures. A science center like no other, one South Dakota could put up against ANY similar science center in the world…and it’s gone belly up, thanks to new “leadership” at South Dakota State.

Small minds, insular thinking…what the hell has happened in this country? Doing work that’s WORLD-renown and applied in all continents is deemed a NEGATIVE, because they didn’t do all their work in South Dakota? Too many foreign students is a “problem”?  It’s a problem that’s certainly not limited to SDSU, GSCE, or South Dakota.  To me it all falls under the same kind of anti-intellectualism, anti-“expert”, anti-SCIENCE paradigm that seems to have infected America.

A South Dakota institution is gone after far too short a time, all thanks to tiny little minds with a lack of vision and appreciation for the bigger picture.

Apr 24 2018

Killing Science, $1 at a time

Author: DakotaBirder • Discussion: No Comments

Landsat Image - Garden City, Kansas

A Landsat image near Garden City, Kansas, depicting the view of irrigated agriculture using center pivots. Monitoring agricultural change and productivity is one of but many applications of Landsat data, providing scientific and economic benefits to the Nation. The latest move by the Department of Interior to potentially begin charging a fee for Landsat data would devastate Earth science activities around the globe. (click for a larger view).

Nature today published a story about a Department of Interior committee studying the possibility of charging fees for data from the Landsat satellite program, data that are currently available for free.  The first Landsat satellite was launched in 1972, with 6 additional satellites launched since then. The latest was Landsat 8, launched in 2013, while Landsat 9 is scheduled for launch in late 2020.  Landsat satellites have provided continuous Earth observations for the last 46 years (!!!!), an invaluable and unmatched record for recording changes on the Earth’s surface. The number of applications of Landsat data is astounding, including monitoring forestry activity (forest harvest and regrowth), agricultural productivity, monitoring urban sprawl, quantifying changes in surface water extent in response to flooding or drought, assessing the impacts of natural disasters, mapping geologic landforms, and a host of other uses. As the Nature article notes, a 2013 committee commissioned to assess the economic costs and benefits of the Landsat program found that while the program costs the US government approximately $80 million a year, economic benefits for the country are staggering…well over $2 billion per year.

Management of Landsat has changed over the years, but USGS and NASA are the two Federal agencies currently managing the program. Until 2008, the data came at a cost to the user...a cost that historically could be quite high.  A disastrous attempt to semi-privatize Landsat data distribution in the 1990s led to costs for each Landsat “scene” (an area approximately 115 x 115 miles) of up to $4,000!  While highly valuable data for a number of applications, the high cost was a major roadblock for usage of the data. In 2008, the USGS made the decision to begin distributing the data free of charge…and usage of Landsat data grew exponentially. Before the policy change, USGS distributed a mere ~50 scenes per day.  Once the data were made freely available, usage jumped more than 100-fold, with thousands of Landsat scenes downloaded per day.  Having freely available data from the world’s premiere long-term observation platform of the Earth’s surface has since transformed Earth science.  Applications once hindered by data costs were now free to tap into the entire Landsat database.

The Nature story notes that under the current administration, the committee is considering again re instituting a fee for access to Landsat. Given the other actions of Secretary of the Interior Ryan Zinke, EPA Administrator Scott Pruitt, and other administration officials with roles overseeing environmental science, it’s easy to speculate as to the real purpose of the committee.  DOI, EPA, NOAA, and other scientific agencies and programs in the Federal government have been targeted for draconian reductions by the Trump industry.  Elimination of environmental science and privatization of traditional government activities has been a major focus of this administration.  My own personal interpretation…this is a move to 1) curtail the vast array of environmental monitoring and analysis that’s occurred since Landsat data were made freely available, 2) bow to the will of industry lobbyists who wish to continue the push towards privatization of Earth observations and increase corporate profits, and 3) eventually extricate the US government from running the Landsat program and other similar Earth observation systems.

Any truly unbiased analysis of the Landsat program would label the 2008 move to freely available data as a smashing success, both in terms of economics and the scientific benefits. Returning to the 1990s and charging high fees for Landsat data access would result in an immediate, sharp decline in environmental and economic applications that use the data.  Given that the one overarching theme of the Trump administration is “corporate profit above all else”, it’s impossible to view this potential move with anything other than a highly cynical eye.

 

Apr 04 2017

Evolution in the blink of an eye…

Author: DakotaBirder • Discussion: No Comments

Prairie Deer Mouse - Peromyscus maniculatus bairdii

The cool thing about science and nature is that interesting stories are all around us. The tiny Deer Mouse, shown here, has overcome long odds, with the vast majority of its historical habitat gone. However, through some remarkable, fast-track evolutionary adaptation, they’re now able to cope with their new world. Photo by Gregory Smith.

It’s been a busy last week, without any time for birding or photography.  Or blogging, for that matter. I was down in Nebraska for a few days, mixing work and pleasure. The “pleasure” part was my fantasy baseball draft in Omaha Saturday.  Our fantasy league is likely one of the longest running leagues in the country, going back to 1985 during our freshman year in college, when fantasy baseball was still very new.  What’s great about it is that many of the original league members are still participating! It’s great fun, not only the draft itself, but catching up with old college friends.

The “work” part of my Nebraska trip was participation in the 2017 Great Plains Symposium, on the campus of the University of Nebraska-Lincoln. Much like the baseball draft, the symposium too was like stepping back in time, as I reconnected with some of my old college professors who were participating in the symposium. The focus of the symposium was “Flat Places, Deep Identities: Mapping Nebraska and the Great Plains”.  I gave a talk one some of the work I’ve been doing, mapping past, present, and potential future landscapes in the Great Plains.  It was a great symposium, a little different kind of crowd than I’m used to.  Given the work I do, most of the conferences and symposiums I attend deal with the physical sciences. This conference melded mapping, history, socioeconomics, and other social sciences that I’m not exposed to as much.  It was quite fascinating, particularly hearing about the history of Nebraska, using maps to help tell the “story” of change over time.

As part of the symposium “goodies”, participants were given a copy of The New Territory, a quarterly magazine that focuses on Missouri, Arkansas, Kansas, Nebraska, and Oklahoma.  I admit I’d never heard of the publication before. The content fits quite well with the focus of the symposium itself, with many human interest stories about the geography and people of the region. As a physical scientist, one piece caught my eye though. entitled “Evolution in the Cornbelt“, by Conor Gearin. The story focuses on the Prairie Deer Mouse (Peromyscus maniculatus bairdii), a common little fellow from the Great Plains that feeds on the tiny seeds of grasses and weeds in the prairies.

Researchers at Iowa State and Purdue University were curious how a species so adapted to life in the Great Plains has been able to thrive, given that >99% of the original tallgrass prairie in the region has been plowed under, converted to agriculture, urban land, or other man-made land uses. The grass and weed seeds the Prairie Deer Mouse had historically fed on were much more sparsely distributed than they were 200 years ago, yet the species is still quite common.  They started field work to assess the distribution of the nice, including setting up artificial nest boxes that the mice could use for habitation and food storage.  The results astounded the scientists.

Prior to beginning the work, it was assumed that deer mice populations would be the highest in “edge” habitat, areas such as grassy ditches, fencelines, or other “boundary” conditions where remnants of their traditional food sources may still be found.  However, they quickly found that the highest populations of deer mice were often right in the middle of very large corn and soybean fields, far from any traditional food source.  Clearly, Prairie Deer Mice had adapted to an agricultural setting, and were feeding on man-raised grains and pulses. The question was, how could a tiny mouse that was so well adapted to eating tiny grass and weed seeds shift gears and start feeding on corn and soybeans?

The researchers found historical deer mice in historical museums, creatures that had been preserved with taxidermy. Anatomical comparisons with Prairie Deer Mice from today found some stark differences.  The older specimens were well adapted to feeding on tiny seeds, with small mandibles and jaws that didn’t open very far.  The modern specimens had 1) significantly longer lower mandibles, 2) structural changes that allowed their mouths to open wider, and 3) larger upper mandibles. Accompanying the larger mandibles were more robust “hardware” for linking bone to muscle, with beefed up jaw muscles that enabled the tiny mice to feed on much larger food items than they had historically.

In the blink of an eye, geologically speaking, Prairie Deer Mice had shown measurable, obvious evolutionary adaptation in response to their new environment and food sources.  The researchers found high densities of deer mice in the middle of corn and soybean fields.  Some inevitably will succumb to the mechanical tools humans use to turn and manipulate the soil, but with such a rich, dense, bountiful food source, the mice had quickly evolved to fill the new ecological niche and feed on corn and soybean waste.

For a scientist like myself, I’m completely dumbfounded by the sheer ignorance of those who doubt science…who doubt climate change is real…who doubt in evolution.  The actual empirical evidence is overwhelming, conclusive, and “in-your-face”, for those who bother to open their eyes to the world around them. It’s a fascinating story, and the writer (Conor Gearin) did a great job not only summarizing the research, but telling it in a true story-teller’s fashion.  To me, this is exactly the kind of story, and writing style, that could perhaps help to turn the tide against the anti-science wave that seems to be cresting in the U.S. right now. Great story, and The New Territory really looks like a publication that’s worth subscribing to or picking up if you get a chance.

Grand River National Grasslands, Harding County, South Dakota

Expansive grasslands of the Grand River National Grasslands, in Harding County, in far northwestern South Dakota. Grassland habitat like this is greatly reduced in the Great Plains. However, that doesn’t seem to be a problem for one species, the Prairie Deer Mouse, who evidently can do quite well without an actual “prairie”.

Mar 13 2017

Meteors in your Gutter, Pollinating Crops with Drones, and more science news – Week of March 12, 2017

Author: DakotaBirder • Discussion: No Comments

This week, let’s try something novel…science news, sans politics.  It seems that politicians in this country have decided we can live without science, so for one week, I’ll try a “news” post where science avoids politics.

Long-horned Bee - Melissodes

A Long-horned Bee, doing what bees do best…collecting nectar and in the process, distributing pollen. If one Japanese researcher has his way, we could soon be using drones to augment nature’s pollinators. A personal comment…let’s hope this never comes to pass.

Who Needs Honeybees when we have Drones? — A first…TWO drone-related stories in one week! While the story above about using drones to acoustically sample birds may seem practical, I admit I don’t see much of a future for this application!  Eijiro Miyako, a chemist in Tsukuba, Japan, was trying to make an electricity-conducting gel in 2007, an endeavor that wasn’t working. His concoction was stored, until 8 years later when he dropped the jar while cleaning out a drawer. Miyako certainly thinks differently than I do, because upon cleaning up the sticky substance, he wondered, “could this be used to pollinate plants”? The decline of honeybees and other pollinators is well-noted, something of potentially devastating consequences to not only natural ecosystems, but to our very survival, given the need to pollinate crops.  Miyako started working with methodologies to pollinate crops, starting out by coating ants with his sticky gel to see if their movements would attract and distribute pollen. It kind of worked, but didn’t seem practical, so he eventually started working with drones.  The drones have a fuzzy material that collects pollen and can redistribute it when the drone brushes up against another plant.  His eventually plan? Build a fleet of 100 or so drones, use GPS and artificial intelligence, and set them loose in a field to pollinate the crops. Well…I guess we all need dreamers, and given how science works, who knows what practical application may come of Miyako’s work?  But hey, how about instead of developing drone pollinators, we instead focus on preserving the natural pollinators we have now?

Norwegian Gutters Clogged with Meteors!! — Jon Larsen, a Norwegian jazz musician, has an interesting hobby.  He’s devoted much of his free time in recent years to looking through material in gutters, downspouts, and drains, searching for extraterrestrial visitors.  Tons of material from outer space enters Earth’s atmosphere every day, much of it microscopic. Larsen has searched through debris in urban settings in search of these microscopic visitors.  His passion has been published in the journal Geology, with a paper that discusses the identification of over 500 “large micrometeorites” from rooftops and other urban settings. Larsen has learned the typical characteristics of micrometeorites, stating “Once I knew what to look for, I found them everywhere”.  Next time you’re up on the roof, cleaning leaves out of those gutters, do it with a smile and a sense of wonder, because it’s extremely likely that you’re cleaning up cosmic debris along with those leaves.

Normalized Difference Vegetation Index - Great Britain

Normalized Difference Vegetation Index (NDVI) for Great Britain, showing relative “greenness” of vegetation at the time. Researchers are studying linkages between NDVI, tree ring width, and volcanic activity to see if vegetation is responding to pre-eruption conditions. Potentially, such changes could be used to help predict an eruption.

Predicting Volcano Eruptions from…the greenness of trees? — I believe this is a poorly written article, but the premise behind it is VERY cool for a scientist like myself who works with satellite imagery.  The title of the story is very poor and somewhat misleading, stating “Can tree rings predict volcanic eruptions”? The story focuses on the work of scientists at the Swiss Federal Institute for Forest, Snow, and Landscape Research. In 1973, scientists noted an anomaly on satellite images along Mount Etna’s flank, a streak of trees that were greener than normal.  With satellite imagery, we can measure a “Normalized Vegetation Difference Index”, a measure of live green vegetation.  NDVI measurements in 1973 satellite observations were high along a streak on the volcanos flank, and less than a year later, a flank eruption occurred right along that very streak.  These scientists hypothesized that measuring tree rings from 1973 would also show an anomaly, and thus the title of this story that tree rings could “predict volcanic eruptions”.  However, the actual results showed no difference in tree ring width during that time frame. Given the relationship between tree ring width and how “good” a year a tree has had, I can see why continued research is warranted to try to find relationships between increased NDVI greenness, and tree ring width, and see if other areas have experienced changes prior to a volcanic eruption.  As it is, there’s not much in this initial research that proves a strong linkage.

Spying on Birds with Drones — On-site surveys of birds is a time-intensive and potentially expensive endeavor if trying to systematically survey birds across broad regions. Researchers at Gettysburg College in Pennsylvania investigated the use of drones for conducting acoustical surveys of birds. They tried flying a drone and extracting acoustical information from a recorder on the drone, and found that the method was able to sample bird presence for about as large a region as a human observer performing a survey.  They have some kinks to work out, primarily related to the noise of the drone masking some of the low-frequency bird noises (think cooing of a Mourning Dove), but they believe technological innovation will soon make drones quieter and more efficient at sampling bird acoustics. I admit I do kind of roll my eyes when I hear people talking about trying to use drones for photography, and for science applications, because in many cases it seems like a stunt more than an actual practical application.  Gettysburg College may be proving me wrong, as this actually does sound like an interesting use of drone technology.

American Chestnut - Wild Survivor

One of the VERY few wild, mature American Chestnut trees left in the wild. Trees such as this may be resistant to blight, and are being used in efforts to develop a blight-resistant stock for eventual transplantation in the wild. Genetic modification is also being done to introduce Chestnut Blight resistant genes in tree stocks.

American Chestnut, Returning to a Forest Near You? — I often wonder what it would be like to travel back in time, to visit locations before they were touched by man. In the United States, the entire eastern half of the country was once dominated by forest land. While forest cutting started in earnest in the 1800s and even earlier in some locations, remaining deciduous forests by 1900 were still populated by 3 to 4 billion American Chestnut trees. It is estimated that one-quarter of trees in the Appalachians were American Chestnuts.  The American Chestnut was a prolific nut producer, with mast from the trees supporting deer, turkeys, bears, and other wildlife, including the now extinct Passenger Pigeon.  In 1904 a fungal blight was discovered, a disease that eventually wiped out nearly every wild American Chestnut. Asiatic Chestnut trees were imported into the country, but with them came an Asian bark fungus that was lethal to American Chestnuts. The disease spread rapidly, killing every American Chestnut tree in its path.  It is now estimated that fewer than 100 trees of any size are left in their former range. Root systems of surviving trees still send up shoots, but the blight infects the trees as they mature, resulting in practically no American Chestnut stems over 10-years old in the wild.  This story is focused on efforts to genetically modify the American Chestnut to include resistance to the blight. 30 years of research has resulted in the introduction of a gene from wheat that makes the trees able to withstand the blight. They hope to gain approval to publicly distribute the trees within 5 years.However, it will still be a long process to repopulate Eastern forests with American Chestnut. The researchers want to cross-pollinate the blight resistant trees with native wild tree stock. Half of the offspring will be blight resistant, and genetic diversity will be much improved over the current research tree stock.  We’re at the start of a VERY long process to restore the tree to the wild, but hopefully our great-great grandchildren will be able to enjoy the same Eastern forest trees that existed prior to 1900.

10 years until “Snowball Earth” — I admit my scientist side geeks out when I read a story like this, as it’s just so cool to think of the physical changes that have, can, and will again happen to our Earth.  Of course the absolutely catastrophic consequences for mankind put a bit of a damper on that excitement!  Harvard scientists have pinpointed the circumstances that led to “Snowball Earth”, a period about 717 million years ago where the Earth was covered in ice from pole-to-pole.  Models suggest that the climate destabilization that plunged the Earth into polar hell could have happened in a blink of an eye in geologic time. Massive volcanic eruptions back then could have ejected enough aerosols into the atmosphere in just a 10-year period to initiate the rapid freeze.  Don’t worry, it’s not a single volcanic eruption that’s capable of such a long-term change, but instead the kind of massive eruptions that mankind hasn’t experienced in our history. 717 million years ago, it was a string of volcanic eruptions across what’s now Canada and Greenland that set off the freeze.  As I said, from a scientific standpoint, fascinating to think what could happen, but it also points out the fragile balance of our climate system.  “Snowball Earth” happened because of runaway cooling and feedbacks that amplified and accelerated the cooling, primarily with increased ice increasing reflectance of solar radiation in a self-reinforcing feedback loop.  Right now we’re playing a game of “chicken” with our climate system, doing the exact opposite, and removing that ice in a self-reinforcing feedback loop that’s amplifying warming.

Snowy Bison

The Bison, invasive species that forever changed North America! Well, if we were around about 150,000 years ago, they would have been considered an invasive species, one that transformed grassland ecosystems of North America.

Bison Contributing to Mammoth Decline?  — OK, my chosen title here doesn’t reflect the purpose of this research, but after reading the story it did make me curious…did Bison contribute to the decline and eventual extinction of the Mammoth? The story used DNA analysis to establish that the ancestors of North American Bison first arrived between 130,000 and 190,000 years ago.  As the story notes, in this case, Bison were the invasive species, rapidly colonizing North America and forever changing the grassland ecosystems of the continent.  It does make me wonder…if not for the establishment of the Bison as a primary grazer in North America, would the Mammoth and other North American megafauna have been better positioned to withstand climate change and the establishment of man? Interesting story, and a story that shows that not all “invasive species” are those that are introduced by mankind.

Managing Diabetes with your Sweat — Especially as a family that deals with the consequences of Juvenile Diabetes, we’re quite familiar with the frequent finger prick to check glucose levels in blood. Researchers in South Korea have developed a prototype glucose sensing and insulin delivery device that looks like an arm cuff.  Instead of measuring blood glucose, it measures glucose in sweat. It’s not just these guys, there are also other researchers who are looking at measuring glucose levels in tears. There certainly have been many technological advances and devices for testing and treating diabetics, innovations that are certainly welcome! I just wish there were some real advances on actually treating the disease, and not just the symptoms.
 
Mar 07 2017

First video EVER of elephant-sized creature…it’s 2017 folks!!

Author: DakotaBirder • Discussion: No Comments

I find it so fascinating how little we know about our own planet.  From a scientist’s perspective, it’s awe-inspiring.  It’s the realization that after centuries of scientific discovery, there’s still so, so much we have yet to discover.  Consider the video below (from the Washington Post):

A video of three whales swimming around…big deal, right?  Well, yeah!!  One of the largest creatures on the planet, and yet it’s a species that has only been SEEN by a handful of human beings.  Never before has video such as this been taken.  The True’s Beaked Whale is a mystery, an animal that’s thought to spend over 90% of it’s life submerged beneath the ocean’s surface. Natacha Aguilar de Soto, a marine biologist with the University of St. Andrews in Scotland, has studied beaked whales for many years, spending months at sea but yet rarely ever seeing ANY beaked whale species, much less a True’s Beaked whale.

However in 2013, a friend sent de Soto a video from the Azores that had been taken by science students on an excursion. The 46-second video above shows 3 adult or sub-adult beaked whales, casually swimming near the surface before slowly swimming out of the frame. De Soto was stunned to see the video of a creature she’d only hoped to see some day.  Using the video evidence, information from dead stranded whales that have been found, and other rare sightings, de Soto published a paper in the journal PeerJ that provides new insights on True’s Beaked Whales. A True’s beaked whale has never before been tagged, but other beaked whale species have been documented diving to over 9,800 feet below the ocean’s surface, the deepest and longest dives of any mammal on the planet. At this stage, so little is known about True’s Beaked Whales that overall population size and trends are unknown.  The article above however points out the dangers to similar beaked whales.  A Culver’s Beaked Whale, a close relative, was recently found dead with over 30 plastic bags in it’s digestive tract, and military sonar has also been implicated in the strandings of similar whales. The video was invaluable for the research, as beaked whales in general are so rare, that even general appearance and distinguishing between species is difficult. The research also hints at the possibility of True’s Beaked Whales actually being two different species, one in the northern Atlantic and one in the southern Atlantic. As deSoto states:

“We don’t know how large the populations of True’s beaked whale or any other species are,” said Aguilar de Soto. “The populations could decline and we would never know.”

An elephant-sized creature, one that’s shared the same planet as us for centuries, yet one that could potentially disappear without human beings ever knowing much about them.  At a time when political winds are telling one of our Federal science agencies, NASA, to stop observing the earth and instead focus on the stars, stories like this remind us how very little we know about our own planet.

Feb 28 2017

Facts trump Fear: A FACT-based assessment of Mountain Lions in South Dakota

Author: DakotaBirder • Discussion: No Comments

Mountain Lion - Puma concolor

A full-grown Mountain Lion on the prowl. No…no…not my photo! This is a wild animal roaming in Yellowstone National Park. You see, like 99.999% of South Dakotans, I will never see, much less photograph, a Mountain Lion in this state. That, despite Mountain Lions seemingly posing as much of a threat to human health and safety as disease, war, famine, and pestilence combined. At least in the minds of many misguided South Dakotans.

I should just avoid the internet.  My blood pressure might be greatly improved if I were able to do that. It’s bad enough that we have Orange Hitler as our president, with a bunch of mini-Hitlers running all of the Cabinet departments. It’s bad enough that the normal news outlets that I check every day, such as the Washington Post or the New York Times, are now dominated by depressing and often downright sickening news stories about how everything that makes America, America, is now being being systematically dismantled.  What’s worse is that the same “alternative facts” political world we live in has permeated EVERY facet of American life, where fact, reason, and logic mean absolutely nothing any more.

Yesterday I was on Facebook when I came across a South Dakota “gentleman”, posing with a huge shit-eating grin on his face as he held up a dead Mountain Lion that he’d just shot and killed. OK, “gentleman” isn’t the word I want to use here, but I’m going to try to stay civil in this post.  Just the facts…so let’s call him “Gentleman Joe”.  It was a BIG mountain lion…160+ pounds…and evidently shooting a BIG Mountain Lion makes Gentleman Joe some kind of hero in the minds of many who were commenting on Facebook.  Normally I’d see something like that, roll my eyes, get a little sick to my stomach at the whole thought of it, and then move on to the next post. OK, who am I kidding…If you know me, you’d KNOW I was going to respond after seeing that.  As I I scrolled down, I noticed a manifesto from “Jim Bob” (I’m sure some relationship to Gentleman Joe, if not by blood, then by ideology).  Jim Bob was praising Gentleman Joe for the great kill, going on with his thoughts about just how much safer South Dakotans were thanks to his kill.

According to Jim Bob, the Mountain Lion horde of the South Dakota Black Hills are taking over the state. According to Jim Bob, it’s seemingly impossible to go outside in the Black Hills nowadays without the imminent threat of a Mountain Lion attack. In Jim Bob’s eyes, the proliferation of Mountain Lions in the Black Hills is akin to nuclear weapon proliferation during the Cold War, and evidently, poses just as much of a threat to humanity.  In Jim Bob world, it’s not safe to wander outside in the Black Hills. Gentleman Joe was indeed a god-damned American HERO for saving a scared South Dakota populous from the Mountain Lion scourge.

White-tailed Deer Fawn - Odocoileus virginianus

Yes, this IS my photo. I know what you’re thinking…TERRY! YOU HAVE A FAMILY TO THINK ABOUT!?!?! How could you risk so much getting this close to a dangerous killer? OK…ridiculous, you say? How much threat does a lil’ White-tailed Deer pose? SCIENCE MY FRIENDS! And the numbers don’t lie. THIS creature is MUCH more likely to kill or injure you than is a Mountain Lion. If you live in South Dakota, it’s not the creature at the top of the page that is a threat to your life.

I responded with facts, providing the TRUE story of Mountain Lions in the Black Hills, and their supposed threat to health and well-being of South Dakota’s citizens. Jim Bob, clearly not accustomed to facing the world of reality, threw a few half-hearted digital haymakers in Facebook response before slinking back to his hole.  He had nothing to respond with, no evidence to back his claims.  But as he departed the digital conversation, it was quite clearly that the barrage of facts I provided did nothing to change his mind. Those facts?

There’s been a grand total of ONE…count them…ONE confirmed Mountain Lion attack IN THE ENTIRE RECORDED HISTORY OF SOUTH DAKOTA.

Even that one event, in 2008, was an unfortunate encounter that resulted from a lion defending a kill, rather than the lion actively seeking out a human being.  Ryan Hughes was ice fishing on Sheridan Lake in March of 2008 when he headed to the shoreline and came across a Mountain Lion crouched down in the cattails, feeding on a fresh kill (thought to be a fox).  When Hughes first spotted the Mountain Lion, he was a mere 5 feet from the lion and its kill. The surprised lion reacted, dropping it’s food and scratching and biting Hughes. Hughes received minor injuries, and was treated and released from a local hospital for minor scratches and bite marks.

Well over 150 years since settlement of South Dakota, and this one, chance encounter is the ONLY MOUNTAIN LION ATTACK EVER RECORDED ON A HUMAN BEING in the state. However, according to Jim Bob, it’s absolutely essential that “heroes” like Gentleman Joe actively thin out the Black Hills Mountain Lion population.  According to fearful, small-minded men like Jim Bob, it’s a matter of public SAFETY.

I have no doubt that for tiny-penis men like Jim Bob, Mountain Lions ARE something to fear (am I still being civil? OK it’s getting borderline). It’s a scary world when you’re an insecure, weak little man-child (yeah, definitely crossing the border now).  Toting a gun into the wild and blasting away at wildlife?  It’s great for boosting those testosterone levels and boosting the confidence of weak she-men like Jim Bob (I am WAY south of the border…bye-bye civility).  But stating Mountain Lion hunting must be done as a matter of public SAFETY?

Deer Collision Risk - State Farm

From State Farm Insurance, a table of the top 5 riskiest states for car/deer collisions. If only there were some natural predator capable of saving us from the Deer threat…

One attack in over 150 years, in a state that covers over 75,000 square miles. Depending on the estimate and year, recent estimates of the number of Mountain Lions in the Black Hills have varied from 200 to 400. Generally they’ve thought to have stabilized around 250 in recent years. It’s a very healthy, strong lion population, yet despite their substantial presence in an area that’s so heavily used for recreation, there just haven’t been any attacks on human beings, much less any serious injury or fatality caused by a Mountain Lion.  That fear from tiny penis she-men isn’t limited to people in the Black Hills region.  Even here at the opposite end of the state near my town of Brandon, there have been stories of fear from the likes of Jim Bob.

While permanent breeding populations of Mountain Lions in South Dakota are almost exclusively found in the Black Hills, wandering individuals are occasionally found elsewhere in the state and region, even here in southeastern South Dakota. In 2014, there were a few sightings of a Mountain Lion just north of Brandon, where I live. A lot of the reports are rather “bigfoot” like, such as a reported brief glimpse of what might have been a Mountain Lion in the headlights of a speeding car on a highway.  But according to this piece from 2014, some in the Brandon area believed that Mountain Lions were setting up shop in the region. A quote from one of the landowners just north of where I live in Brandon?

Those spottings are just a sampling of the evidence of what Heggen said is a long-running pattern of the lions, which are solitary animals, being a nuisance in his area.

Yes, Mr. Heggen. It’s a “long-running pattern” of Mountain Lions roaming the Brandon Area.  They are a long time “nuisance” here in extreme eastern South Dakota, an area that’s 90% corn and soybeans and unlikely to EVER host a Mountain Lion for any length of time. They have indeed been spotted from time to time. I even know of a guy at my work who has seen one in the area.  But as the story above notes, in 2013 there were only 6 recorded Mountain Lion sightings in the entire state outside of the Black Hills.  Only three of those were in the eastern half of South Dakota. It’s not exactly a “long-running pattern”, and it’s a far cry from Mountain Lions being a “nuisance” in the area. More quotes from the Brandon-area story:

“But we don’t have any raccoons, skunks, possums or even pheasants running around anymore. And for a while, we didn’t even see any rabbits, although we’ve seen a few smaller ones lately,” he said.

 

“I’m guessing they (the lions) are eating them,” Heggen said. “They aren’t scavengers like coyotes.” He said that what he fears most is having his 5-year-old son being harmed by one of the lions in their farmyard.

Mountain Lions Killed - American West

From the Mountain Lion Foundation, a graph of the number of Mountain Lions killed by hunters in the American West from 1900 to the present day. In the last 20 years, hunters have generally killed 3,000 to 4,000 lions a year. In South Dakota in 2017, Game Fish & Parks are allowing up to 60 Lions to be killed.

Once again, let’s return to the facts…ONE CONFIRMED ATTACK IN THE ENTIRE HISTORY OF THE STATE, yet people like this are evidently fearful for the lives of their families.  There are other ridiculously speculative comments in the story, such as one time some cows were spooked by something (clearly HAD to be a Mountain Lion, right?), or that one fall he didn’t see any deer while harvesting his corn (Eegads!  More Mountain Lions!!). Please spare me the anecdotal bullshit about all the poor little animals in the area disappearing, and attributing it to roving Mountain Lions. Trust me, we have PLENTY of deer, raccoons, skunks, opossums, pheasants, and rabbits running around this part of the state.  It’s hard to drive any road in the area and not notice all the road kill on the sides of the road.

I’m perhaps being a little (ok, more than a little) harsh on people like this, but as a scientist, my biggest pet peeve in this world are fearful, ignorant human beings who ignore fact, logic, science, and reason, and instead let their innermost fears and emotions rule their lives. The vast majority of people in the Black Hills, an area that may indeed have one of the highest Mountain Lion concentrations in all of North America, will never even SEE a Mountain Lion in their lifetimes, much less have an encounter or an attack.

I also realize it’s not just the fear of men (with tiny penises) that drives this hatred of Mountain Lions, and the “lionization” (ha-ha) and hero-worship of those who kill them. No, beyond the fear, it’s INSECURITY, and their need to KILL, to express their manliness, that also drives attitudes like those of Jim Bob. That rationalization that it’s up to THEM to SAVE us from the Mountain Lion scourge…that attitude certainly plays to their insecurities, and it’s a great excuse for those who just love to go out and kill things.

On the latter point, hunters in general often have a problem with predators like Mountain Lions, for the simple fact that Lions are competition for the same kinds of prey that hunters like to target. As this story from 2010 points out, Mountain Lions likely kill just as many deer in the Black Hills as do hunters. The entire anti-Mountain Lion vibe in that part of the state simply boils down to this basic statement from this story:

Some hunters don’t like the increased competition from lions, said Mike Kintigh, GF&P regional supervisor in Rapid City.

A Mountain Lion kills a deer, that’s one less deer for hunters to kill.  In the minds of “Sportsmen” who think like this, targeting Mountain Lions is a win-win proposition.  It gives hunters the chance to kill a large, challenging animal, while at the same time reducing a major predator of game such as deer and elk.How do you combat some of the “fact-challenged” rhetoric from the anti-Lion crowd in South Dakota?  Facts don’t seem to have any impact on people like this, but as a scientist, it’s quite easy to shoot down the “logic” of these folks with some basic empirical evidence and numbers.

  • ONE — Again…in the entire history of the state, only ONE recorded attack of a Mountain Lion on a human being, and that was an obvious case of just being in the wrong place at the wrong time, surprising a mountain lion on its kill.
  • THREE — In all of Eastern South Dakota in 2013, there were only three confirmed Mountain Lion sightings. No, East River paranoids, Mountain Lions are not in any way a “nuisance” or any kind of threat in the 30,000+ square miles east of the Missouri River. Let’s at least keep the argument just to the Black Hills region.
  • 250 — That’s the roughly the number of Mountain Lions currently thought to be in the Black Hills. In an area of about 5,000 square miles, that puts the number at about one Mountain Lion for every 20 square miles.  That’s a high density for anywhere in North America, much less for such a heavily used area like the Black Hills.  Yet again, despite the number of lions and the potential for interaction with the thousands of visitors and residents in the Black Hills, dangerous encounters have been non-existent.
  • 5,500 — That’s how many deer may be killed every year in the Black Hills by Mountain Lions.
  • 90,000 — Roughly the number of deer killed by hunters every year in South Dakota in the 2000s…during the exact time period when researchers believed Mountain Lion populations were at all-time highs in the Black Hills, with potentially 400 individuals present.
  • 69% — Recent success rate of hunters targeting deer in the Black Hills.  Evidently the Mountain Lions have left one or two deer for human hunters.  No, hunters, Mountain Lions are not wiping out the Black Hills deer population.
  • #5 — South Dakota was recently ranked as the 5th most likely state for a driver of a vehicle to strike a deer.  One in 70 South Dakota drivers on average have a claim related to a deer collision.  Perhaps a little NATURAL population control would benefit South Dakotans, particularly since the risk of any negative consequence (aka, an attack) is far less than the odds of being struck by lightning.  If only there were some SCIENCE to back this up…hmmmm……
  • 155 — That’s how many lives in the eastern United States would be SAVED over a 30-year period in the eastern United States, IF Mountain Lions were reintroduced into the area.  The number comes from a detailed socioeconomic analysis of the impacts of reintroducing Mountain Lions in the East. The savings come from the reduction in deer populations that would result from the introduction of their most effective natural predator, and the resultant reduction in deer-car collisions.  The same study found that over $2 BILLION in insurance costs would be saved over the 30-year period.

Not to let something as mundane as “science” get in the way of the thinking of people like Jim Bob, but if that many lives and insurance dollars would be SAVED in the eastern U.S. by reintroducing the Mountain Lion, how many avoided collisions in the Black Hills are a result of the presence of Mountain Lions?  How many lives have thus been SAVED by the presence of Mountain Lions in the Black Hills?  If you’re doing a cost-benefit analysis, that would be XX number of lives saved, compared to…ZERO lives that that EVER been lost in the state as a result of a Mountain Lion’s activities. What? That’s all speculative you say?  Not so fast my friends, SCIENCE TO THE RESCUE AGAIN!! From the same socioeconomic analysis:

South Dakota offers a test case example of how effective this solution might be. Cougars have been slowly migrating East: They only recolonized the Black Hills in western South Dakota in 2005. When Gilbert and her team looked at mountain lion recolonization in the western part of South Dakota, they found that from 2005–2012, deer-vehicle collisions fell by 9 percent, resulting in $1.1 million in annual societal benefits for the citizens of western South Dakota. (A 9 percent reduction in seven years is roughly on par with the 22 percent reduction, which researchers think will take 30 years from recolonization.) By avoiding an estimated 158 deer vehicle collisions annually, auto insurers are already saving roughly $630,000 a year in payouts in the Black Hills.

DATA!  REAL DATA showing the decline in deer-auto accidents in South Dakota that occurred RIGHT when Mountain Lion populations were spiking in the region.

If you support Mountain Lion hunting in South Dakota, please spare us all the bullshit.  It’s NOT a safety issue.  Not to let facts spoil your storyline, anti-Mountain Lion, crowd, but from a safety standpoint, there’s absolutely no doubt that South Dakotans are safer WITH Mountain Lions than without.

SCIENCE!! NUMBERS!! FACT!!!

If you’re going to spout off about the need to “control” Mountain Lions, skip the crap about safety.  It’s clearly about either 1) your COMPLETELY irrational fear of a beautiful creature that’s MUCH less likely to harm you than is your hair dryer, shaver, or random bolt of lightning, or 2) your desire to KILL a creature for no other reason than the enjoyment of the “sport”.

For more information, here are some of the journal and news articles mentioned in this blog post:

Feb 09 2017

Predicting that next winter finch irruption

Author: DakotaBirder • Discussion: No Comments

Pine Siskin - Spinus pinus

A Pine Siskin, a regular but unpredictable visitor in winter in South Dakota Research shows that southward irruptions of boreal finches such as Pine Siskins may be predicted from recent seasonal climate records.

Not a lot of time this week to blog, as I’ve been in pretty intense meetings all week for work.  However, it was through those meetings that I became aware of this interesting research paper.  Birders are always wondering when that next great “irruption” of boreal bird species will occur.  On occasion, boreal finches such as Common Redpolls, Pine Siskins, and Crossbills will move southward in great numbers from their boreal forest stronghold.  The thought is that such irruptions occur when poor “mast” production occurs, with lower conifer seed numbers than normal.  The birds thus move southward in search of food.

It’s not just boreal finches that are subject to occasional southward irruptions.  One of the greatest birding experiences of my life was during the huge boreal owl irruption into northern Minnesota over a decade ago, when Great Grey Owls and Northern Hawk Owls were seemingly “dripping off the trees”.  Those irruptions are thought to be due to a similar driving force…a loss of a primary food source…with periodic crashes of small rodent populations driving the owls southward in search of food for the winter.

The paper below (click to see it) gives an assessment of climate data to potentially predict when a finch irruption would occur.  The species studied here is the Pine Siskin, but the authors note that it may also apply for other boreal finch species that depend on conifer mast.  Cool study…

More coming next week!  Given I’m still in meetings the rest of the week and have family obligations all weekend, it’s likely the next blog post won’t come until Monday!  Click below for the study…

Predicting finch irruptions with climate information

Dec 20 2016

Time to edit the website again…

Author: DakotaBirder • Discussion: No Comments

Hoary Redpoll - Carduelis hornemanni

A Hoary Redpoll in my crabapple tree. For now, I can still count a Hoary Redpoll as its own species, as the AOU committee decided to hold off on a proposed action to merge Hoary and Common Redpolls into one species. Which means for one more year, I can proudly proclaim that I’ve had a rare Hoary Redpoll in my yard.

It’s damned hard trying to keep up with all the official changes on the American Birding Association’s (ABA) North American birds checklist! The ABA list is generally based on the checklist from the American Ornithological Union (AOU).  Every year, the AOU Checklist Committee considers formal proposals to change the checklist, with recommendations coming from scientists who have published research and other materials that may support a checklist change.  Every July The Auk (the journal for the AOU) publishes the changes for the year.  And every year, I either ignore those changes, or spend several months delaying any related changes to my website.

Ever since I started my website more than 15 years ago, I’ve been working on having individual species pages for each species seen in North America.  Especially when a new species is added, I try to keep up and edit my checklist and summary pages, but I admit I’m behind in doing so.  If it’s simply adding a new species (for example, if an exotic species is now established enough in the U.S. that the AOU considers it a new, permanent species in North America), it’s easy enough to add a page.  I’m fairly caught up with those changes. What’s a major pain in the butt is trying to keep up with the “order” changes.  Every year, they make changes in the official “order” that species are listed in the checklist. The AOU checklist is presented in a “phylogenetic order”, using DNA and other information to “rank” species according to their origin and where they are on a evolutionary tree.  Basically, more “ancient” species are listed first, while species more recent in origin are listed last. On my pages, for example, I still have finches “ranked” very near the bottom.  However, in recent years finches have received a “promotion”, and are now higher on the phylogenetic order list.  It’s a major change moving things around on my master species page, thus the order changes that have occurred in recent years are those changes least likely to be represented in my checklist and species pages.

Here we are in mid-December, a mere 5+ months since the latest updates, and I’m finally taking a peek at the changes.  Looks like I have more work ahead of me on my website, particularly if I want to update the checklist order.  Some highlights of the changes for the year:

  1. Scrub Jay species — I have a new species on my life list, thanks to a new species split!  The Western Scrub-Jay has been split into two distinct species, the California Scrub-Jay (Aphelocoma californica) and Woodhouse’s Scrub-Jay (Aphelocoma woodhouseii). The California species is found from Baja California northward into Washington state, and is darker with richer colors, while the interior species is found in the dry interior of the southwestern U.S. and is paler in appearance.  When a species is split like this, it’s sometimes hard to know which of the new species you’ve seen, but fortunately I have photos of the former Western Scrub Jay from both California and Arizona, meaning I’ve seen (and photographed) both new species!
  2. Leach’s Storm-Petrel split —  The Leach’s Storm Petrel has been split into 3 distinct species.  Given a pelagic species such as a storm petrel isn’t exactly native to South Dakota, it’s not one I’ve seen, but alas, it still means a needed change on my website.
  3. Changes in scientific names — I won’t pretend that I understand why scientific names of species are sometimes changed.  Most of the changes this year are for shearwater species, but I saw they also changed the Sandhill Crane from Grus canadensis to Antigone canadensis. 
  4. Substantial changes in the phylogenetic order — Of course.  Sigh.  A hard one to keep up with, and once again this year, these are changes I’ll likely ignore on my website. Especially once you’ve been birding for a while and have used the same field guide for years, it’s tough even in your own mind to mentally adjust to a different “order” of species.
  5. Redpoll species — My “best” yard bird without question was a Hoary Redpoll that showed up 3 or 4 winters ago. That winter was the only winter I’ve ever even had Common Redpolls in my yard, but one day my son looked out at several redpolls on our thistle feeder and asked “what’s the white one”?   It wasn’t exactly white, but there was a Hoary Redpoll that was very obviously different than the Common Redpolls around him.  For years it’s been speculated that the Hoary Redpoll really isn’t a different species, that it’s just a plumage variation.  The AOU committee decided for now to hold off on lumping the two into one species, so for now, my best yard bird still holds!!
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