Articles

Dec 13 2016

The return of Clyde

Author: DakotaBirder • Discussion: No Comments
Cooper's Hawk - Accipiter cooperii

“Clyde” the Cooper’s Hawk, giving me the evil eye for daring to question his presence in my back yard. Perhaps it’s not me, perhaps he’s upset for another reason. He had just attempted to catch a House Sparrow at my feeders, and failed. Given the remains of feathers I’m increasingly finding in my yard this winter, it’s clear that he also succeeds quite a bit.

It almost seems like a horrible nightmare, looking back on our life one year ago.  We were living a happy, blissful life in the suburbs when he appeared.   “Clyde” terrorized our back yard, suddenly appearing when you least expected him, wreaking havoc and sewing fear. We had nightmares of a lifetime of Clyde appearances, fearing the phantom menace that would dominate our very existence.  However we were lucky (or so we thought).  We thought we had escaped the horrors of Clyde when he disappeared as suddenly he initially appeared, granting us many months of Clyde-free bliss. We thought we’d never again have to worry about Clyde.

We were wrong.

Clyde.  Is.  BACK.

Clyde made his reappearance on Thanksgiving Day.  A peaceful Thanksgiving dinner was interrupted by the sudden flurry of activity in the back yard, with songbirds scattering and fleeing for their lives while Clyde came roaring through the yard, looking for an easy meal.  Clyde (so named when he first appeared in our yard last year) is a Cooper’s Hawk, and he does what Cooper’s Hawks do…chase and eat birds.  We’ve had a bumper crop of House Sparrows this year (never a good thing), as well as a large number of American Goldfinches feeding on our big thistle feeder.  Throw in the ever-present Dark-eyed Juncos, the similarly common Black-capped Chickadees, and periodic visits by Downy Woodpeckers, Hairy Woodpeckers, Red-bellied Woodpeckers, Blue Jays, and White-breasted Nuthatches, and Clyde has a veritable buffet of birds from which to choose.

On Thanksgiving day, it was a beautiful male Northern Cardinal that he appeared to key in on.  The first sighting was when a flash of red flew up from the feeders, hovered a moment by the sun room window as it desperately sought escape, and then bolted for cover in the trees in the back of the yard.  Clyde gave it a good try, darting towards the Cardinal by the window (and nearly crashing into it himself), but on that occasion, the prey was the winner.  That’s not always the case.  Clyde is a pretty damned good bird hunter.  Ever since Thanksgiving, there’s been plenty of evidence of his successes, with little piles of feathers generally all that’s left after he’s consumed his catch.

In reality, I like having Clyde around.  I know some people (my wife included) aren’t fond of attracting birds, only to see them serve as prey for predators that attracted to their presence. For me, it’s fascinating watching their interaction, and regardless of whether I have a bird feeder up or not, Clyde is going to hunt and eat birds, and the songbirds that serve as his prey are going to be hunted and eaten.  Circle of life, something which certainly adds to the birding experience in a dreadful, cold, snowy South Dakota winter.

Oct 12 2015

Pictures! Of things with “feathers”!!

Author: DakotaBirder • Discussion: No Comments
Nelson's Sparrow - Ammodramus nelsoni

A Nelson’s Sparrow, one of the rather elusive “skulkers” that moves through the area in the fall.

For a website that started out as a place to share my bird photos, it sure seems like it’s been a long time since I’ve actually posted any bird photos.  Snakes?  Check!  Insects? Check?  Even an aurora? Check!!  But photos of creatures with feathers haven’t been very prominent lately.

It’s not like I haven’t been out birding.  Since late May, I haven’t birded as much as I would over a normal summer, but I have been out on occasion.  I truly haven’t had much luck getting good photos though.  Part of the issue is 1) my reluctance to shoot (yet more) photos of species that I already have many photographs, and 2) a higher standard for what constitutes a “keeper” photo.  In bird photography, it’s inevitable that you’ll toss most of your photos (dang things don’t sit still and pose for a nice picture!), but I toss more photos now than I ever have.

Red-tailed Hawk - Buteo jamaicensis

A Red-tailed Hawk, busy feeding on grasshoppers. This guy was gorging, looking down from this fence post, dropping down to grab the sluggish fall grasshoppers, coming back to the post to consume it, and then looking for another.

I spent time birding and taking photos the last couple of days, with the intention of actually getting photos “good enough” to put on my website.  Mission accomplished!  I really love birding in the fall.  While May is a magical month for warblers and other migrants that move through, October is a month for sparrows!  Sparrows aren’t exactly high on the “must see” list for most people (even many birders), but there’s a wonderful variety that moves through in the fall.  Despite the tendency for most people to think of sparrows as rather drab birds, there are also several with truly beautiful plumage.

One of the highlights in the fall for me are finding Le Conte’s and Nelson’s Sparrows.  Neither breed in my part of the state, and I never seem to be able to find them when they move north through the area in the spring.  However, I have multiple locations where I’ve had great luck finding them in the fall, particularly Le Conte’s Sparrows.  The species is highly sought by many birders, having a reputation of being “skulky” and difficult to find.  They definitely do stick to thick vegetation, usually in thick wet meadows or along the edges of wetlands, but with patience, you’ll usually get some good looks of them as they forage and go about their business in the fall.

Savannah Sparrow - Passerculus sandwichensis

One of the more common sparrows moving through in the fall, a Savannah Sparrow. You often see loose collections of a few dozen birds at this time of year.

Raptors can also be fun in the fall, typically not so much for variety of species in this part of the state (southeastern South Dakota), but in terms of sheer number.  You tend to see concentrations of American Kestrels, Red-tailed Hawks, and a handful of others as they move through in the fall.  It also tends to be a pretty good time for photographing them, as many are first year birds that tend to not be as spooky as older birds.

Note although it’s likely too early, I spent some time this weekend bushwhacking through cedar thickets, looking for early arrival Northern Saw-whet Owls.  No luck!  But I am looking forward to their arrival.   One of the few bright spots of a chilly South Dakota winter!

As always, click on the images for larger views.

 

 

Cooper's Hawk - Accipiter cooperiiHarris's Sparrow - Zonotrichia querulaMarsh Wren - Cistothorus palustris

Sep 04 2015

Playing “Jenga” with nature

Author: DakotaBirder • Discussion: No Comments
Ecosystems are like the game of Jenga...take one piece away you don't know what will happen.

Ecosystems are like the game of Jenga…take one piece away you don’t know what will happen.

You never know what will happen when you remove one piece of the puzzle.  Can it survive for a little while longer, albeit in a weakened state?  Or will it all come crashing down when that one piece gets removed?

Yes, I could be talking about the game of “Jenga”, something many of us have played.  But in this case I’m talking about nature.  In the journal Science Advances, research was just published that discusses a link between hawk populations in the southwestern U.S. and breeding success of Black-chinned Hummingbirds.  One wouldn’t immediately think there was much of a link between the two species.  Hummingbirds are far too small and quick for most hawk species to deal with.  They likely couldn’t capture them, and even if they did, they wouldn’t be more than a mouthful.  So how are the species linked?

As the paper discusses, there are actually three bird species who interact to affect nesting success of the hummingbird.  In addition to the Black-chinned Hummingbird, the study looked at Cooper’s Hawks and Mexican Jays.  What they found was that nesting success was much higher for the hummingbirds when they nested very close to Cooper’s Hawk nests.  The Cooper’s Hawks don’t feed on the hummingbirds, but they ARE a threat to Mexican Jays, and Mexican Jays will readily eat hummingbird eggs and young if they get a chance.  In one case, after Cooper’s Hawks left one nesting location, the researchers immediately saw Mexican Jays move in and decimate all hummingbird nests in the area.

Jenga…ala Mother Nature.  That’s what so scary when human beings start to interfere in natural systems.  One of the most publicized impacts of the removal of one species from a system is the Yellowstone ecosystem, before and after the reintroduction of wolves.  It was expected that the reintroduction would impact ungulate populations in the area, but it soon became apparent just how far-reaching an impact wolves have on the ecosystem.  Without wolves, elk and deer browsed freely in lowlands, resulting in nearly all young aspen trees to be browsed to the ground.  Aspen habitat all but disappeared in the park, but with the reintroduction of wolves, that habitat is now being reborn.  With increased aspen came more beavers.  With more aspen habitat and beaver ponds came an influx of more songbirds and other species that use those habitat.  With more wolves, there were fewer coyotes, which meant more small mammals and an increase in numbers of red fox, eagles, and ravens.

All due to the removal of one species.

Be it hawks in the Southwest or wolves in Yellowstone, the removal of one key species can have cascading impacts on the entire ecosystem.  The same certainly can be true in the “reverse” case, where a new, exotic species is introduced into the system.  As a scientist, it’s fascinating to see the incredible impacts humans have on ecosystems, both through how they manage the landscape, and in how they manage the wildlife within that landscape. As just a human being…it also can be pretty depressing to see how we negatively impact so many ecosystems.

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