Articles

Aug 12 2018

The Monarch Butterfly vs. South Dakota Politics

Author: DakotaBirder • Discussion: No Comments
Monarch Caterpillar - Danaus plexippus

A Monarch Caterpillar having lunch. This was taken in a roadside ditch in Minnehaha County, South Dakota, but it’s not nearly as common a sight as it could (should) be. Ditches here are mowed, sprayed, and otherwise managed, resulting in ditches (even on rarely used gravel roads) often looking like golf courses or urban lawns.

Yesterday I birded several locations to the northwest of Sioux Falls. I traveled through not only Minnehaha County (where Sioux Falls is), but also nearby McCook, Lake, Kingsbury, and Brookings counties. When I go birding around here, I typically travel on gravel roads, to minimize interaction with other cars and reach places where I can actually stop and watch for a while. While traveling gravel roads through these counties yesterday, I was struck by the incredibly variable management of roadside ditches.

What’s that? You don’t pay much attention to the ditches when you’re driving? I can’t say I normally do either, but I was recently at the North American Congress for Conservation Biology Conference (NACCB), where there were a number of presentations on the plight of the Monarch Butterfly. They’re a species dependent upon milkweed. One of the problems is that SO much of the United States landscape is now being used for agriculture, urban development, energy development, and other uses, and milkweed is crowded out.  Even in areas adjacent or near to agricultural land, herbicides are often used for weed control, further reducing milkweed abundance.

This spring, I was contacted by researchers who were studying landscape change, and how it potentially impacted Monarch Butterflies. Specifically, they were interested in using our landscape modeling to look at future landscapes, and the resultant impacts on both milkweed and Monarch butterflies. In the model they used, they were assuming that roadside ditches in most areas were places where milkweed was likely to be found.

As I quickly learned on my drive yesterday, that characterization is clearly NOT true in many areas, and seems to be strongly driven by local politics, in terms of local land management.  When driving in Minnehaha County, I often come across sprayer trucks, actively spraying herbicide in all the ditches to keep herbaceous weeds in check.  I also often come across tractors with mowers attached, mowing the ditches close to the ground.  Yes…even for the GRAVEL roads that rarely get traffic, the ditches are treated in this manner.  The result? The ditches around here often look like a well-manicured lawn (see photos below).  Hell, they often look BETTER than my yard does!! They often consists of nearly 100% brome grass (an exotic, BTW), while milkweed stems are few and far between, and are typically relegated to small spaces where a sprayer didn’t reach.

When driving through parts of Kingsbury and Brookings counties, I was struck by the incredible difference in the ditches. Many ditches clearly hadn’t been mowed in some time, if they were ever mowed. Grasses were mixed with wildflowers, other herbaceous plants, and yes…MILKWEED (see more photos below).  Milkweed was often present in very high abundance.  The issue clearly isn’t adjacency with actively growing agricultural crops. As the photos below show, the Brookings and Kingsbury County ditches often had an abundance of herbaceous plantlife in areas directly next to corn and soybean fields.

It is possible that I just happened to drive on some gravel roads yesterday in Kingsbury and Brookings counties where no action was taken, but spraying was occurring elsewhere.  On the Brookings County website, for example, I was disappointed to find this page, that notes the county DOES spray right-of-ways with “products such as 2,4-D, Tordon 22K, and possibly mixtures of them“.  They do note on their web page that they spray in May, so clearly they don’t spray all ditches, as the photo below (with the milkweed) is on a gravel road on the very western edge of Brookings County.

During the NACCB conference, one talk I heard focused on recovery efforts for the Monarch, and plans in place to improve Milkweed abundance and improvement. Even a dead-red, conservative state like Oklahoma is taking action, with the Oklahoma highway department specifically managing ditches for Monarch and pollinator habitat. They are specifically planting wildflowers and milkweed along highways in an effort to help not only Mmnarchs, but other species that depend on these plants. The discussion at the conference was a similar “Monarch Highway” stretching from Texas up northward through southern Canada, an area with highway ditches specifically devoted to herbaceous plants, including Milkweed.

Could such a thing happen up here in South Dakota? I’ll see it when I believe it. We have such an focus on agricultural production, that I find it hard to believe they’d accept any land management action that could possibly harm that production in any way.  Not that I BELIEVE an aggressive, pro-Milkweed, pro-Monarch Butterfly agenda would harm agricultural production, but in this VERY red state, environmentalists are usually portrayed as the enemy.  For a large portion of the populous here, I have no doubt they’d view a program like Oklahoma’s as an attempt by environmentalists to meddle in local affairs.

It’s hard to imagine now, but when we moved to South Dakota 25 years ago, our Congressional delegation was completely Democratic. Hell, we had Tom Daschle as a Democratic Senate Majority Leader.  How times have changed. Serendipity may have led to the 3 Democratic Congressional delegates 25 years ago, but in today’s anti-environmentalist concerns for issues like the Monarch Butterfly as far removed from most South Dakotan’s minds.

Minnehaha County Roadside Ditch

I wish my yard looked this green, lush, and free of weeds. Driving home yesterday through northern Minnehaha County, THIS is what roadsides looked like. Even for lightly traveled gravel roads such as this one. Frequent spraying and mowing ensure a monoculture of brome grass, with nary a milkweed stem in sight.

Brookings County Roadside Ditch

In contrast to the Minnehaha County ditch, this is what I saw in many parts of Kingsbury and Brookings Counties. This ditch clearly hadn’t been mowed or sprayed this summer, and was full of herbaceous plants other than brome grass, including many milkweed stems.

 

 

 

Jun 17 2015

The tale of “Swabby” and “Captain”

Author: DakotaBirder • Discussion: No Comments
Pearly-eyed Thrasher - Margarops fuscatus

“Captain”, the bold “leader” of the local clan of Pearly-eyed Thrashers hanging out around our vacation beach house at St. John’s in the Virgin Islands.

Back from the Virgin Islands!  The family vacation for the summer was on the island of St. John’s in the U.S. Virgin Islands.  We had a rental house right on the water and had a wonderful time.  Our own little private cove and beach, wonderful snorkeling right outside the door, and great food. Of course, there was also a wee bit of birding involved!  I’d never been to the Caribbean, and although the relatively small island of St. John’s doesn’t have a huge variety of bird species, there were some nice “lifers” I was able to see and photograph.

One of those species is the Pearly Eyed Thrasher.  They are a very common and very visible species in the area, but given their geographic range, they were obviously a “new” species for me.  It didn’t take long after we arrived for us to see our first Pearly Eyed Thrasher!  We flew into St. Thomas and took the ferry over to St. John’s, then driving across the island towards Coral Bay and the location of our beach house.  The owner met us and as we were being shown the features of the house, we were greeted by “Captain” (the name my son immediately gave him!), an extremely tame Pearly eyed Thrasher who the owner said “owned” the beach house! Captain certainly did act as if he owned the place!  Every time we were on the deck overlooking the ocean, Captain was there, either casually searching for food, or just hanging out on a nearby tree or the deck itself.  Captain was certainly curious, often choosing to sit and perch within just a few feet of where we were lounging.

Captain was usually accompanied by “Swabby” (again, the name my son gave him!).  “Swabby” was a bit more shy than Captain, and usually was only around if Captain was around.  Swabby generally hung out a little further away from us than Captain, but he too was often very close to us.

I knew before we arrived that they were a common species, with one local birder telling me that locals in the Virgin Islands think of Pearly eyed Thrashers in much the same way as we would think of House Sparrows or Common Grackles here.  One of the joys of birding, however, is seeing a “new” species.  No matter how common a Pearly eyed Thrasher is in the Virgin Islands, they were new to us and were a real joy to have around, particularly as they were so tame and entertaining.  Clearly Captain and Swabby were accustomed to guests at the beach house.  The owner warned us not to leave any small items out on the deck, as they would be “confiscated” by Captain and Swabby!  That certainly was the case for food items too, as Captain and Swabby could be quite bold in begging for food.  We refrained from giving them “human food”, but after noticing their love of the petals of a certain flower, we did gather a few on occasion and put them out for Captain and Swabby to enjoy.

Pearly-eyed Thrasher - Margarops fuscatus

“Swabby”, the day after an accident or attack left him with an obviously broken leg. Despite the horrible looking injury, Swabby seemed to quickly adapt to his new situation.

3 days after arriving, it was obvious that Swabby had been attacked or had some serious accident.  One of his legs was clearly broken and/or dislocated.  The leg was useless to Swabby, held at an awful-looking angle.  For the first couple of days after the leg was broken, Swabby struggled. He wasn’t around as much, and when he did come near the deck, he struggled to adapt to his new situation.  He didn’t seem to have enough strength in the one remaining leg to hold up his body, so whenever he landed somewhere, he typically would lay on his belly.  We gathered a few more flowers for Swabby, and thankfully he was still feeding normally. After a couple of days, the leg still was useless and was still held at a horrible angle, but Swabby seemed to be gaining strength in his remaining leg.  He was starting to hop around on one leg, and seemed to be able to hold his body up with the one leg.

Of course we’ll never know what happened to Swabby, but there are a couple of “unnatural” predators on the island that could have been the culprit.  Mongoose were introduced to the islands many decades ago, a misguided attempt to control runaway rat populations (another introduced species).  Mongoose have had a devastating impact on the native wildlife of the Virgin Islands, particularly on ground-nesting birds.  Another potential culprit is another introduced species, the iguana.  We ran across some extremely large iguanas during our trip, including one gorgeous, bright green iguana in a tree right outside the beach house.  My guess is that either a mongoose or an iguana managed to get a hold of Swabby’s leg, and Swabby only escaped after breaking free of whatever predator attacked him.

Green Iguana - Iguana iguana

A gorgeous Green Iguana lounging in a tree outside the beach house in St. John’s. Could he be the cause of Swabby’s broken leg?

As we left the Beach House to start the long trek back home, Captain and Swabby of course were present to give us a proper send off!  We did put out a bit of left-over bread as we left, which Captain and Swabby immediately devoured.  “Common” or not in the Virgin Islands, it was a treat to see a new species.  Birders tend to get enamored with adding new species to their life lists, and often forget to appreciate the birds that are commonly seen.  Watching their behavior at such close range, interacting with them in the way we did, was a reminder to appreciate the “common” species we have back here in South Dakota.

May 04 2015

Now vs. then…how things change

Author: DakotaBirder • Discussion: No Comments
Upland Sandpiper - Bartramia longicauda

Upland Sandpiper, how you always see them around here, on a fence post. Unfortunately they’re not a common sight any more in my part of South Dakota

Cattle Egret - Bubulcus ibis

The new kid on the block, a Cattle Egret. I’d pretty much expect to see these guys more commonly than Upland Sandpipers in my part of South Dakota.

I spent Sunday morning birding in Lake and Kingsbury counties, to the northwest of Sioux Falls.  Early May, certainly a great time to get “First-of-Year” (FOY) birds, and I certainly saw quite a few new species for the year.  It wasn’t a great day for photos though, as there were really only about 3 species of which I got decent photos.  Two of those species, Cattle Egret and Upland Sandpiper, were FOY.  Both are species I don’t see all that frequently in this part of the state.  As I was driving home I was thinking about the photos I got for the day, and it struck me that right now, in this part of South Dakota, I’d probably expect to find Cattle Egrets before I’d find Upland Sandpipers.  How things change…

In Minnehaha County, the county that contains most of Sioux Falls, I’ve only seen Upland Sandpipers on a handful of occasions, and only once during breeding season.  Given their preference for grassland for breeding, that’s not a surprise, given that we’re mostly corn and soybeans around here, with little prairie/grassland.  Cattle Egrets however, are very well named, as pretty much every time I’ve seen one in South Dakota, they’ve been in a pasture and in close proximity to cattle.

Upland Sandpipers are obviously the natives here, and there’s little doubt that they were once vastly more numerous in my part of South Dakota than they are today.  You could say the same for a heck of a lot of grassland species, birds that were once seen in southeastern South Dakota that have now all but disappeared.  Cattle Egrets are the newcomers.  They were unknown in the New World, until a few ended up in South America in the late 1800s.  By 1950 they had spread all the way to the United States, and for quite a while they have now bred up here in South Dakota.  From all indications, Cattle Egrets were natural invaders with a handful somehow making it to South America unaided, they weren’t introduced.

It does make you wonder what birds you’d find around here today, had people never settled the area and converted nearly all grassland into agricultural land.  Upland Sandpipers would definitely be around, but given the Cattle Egret’s desire to hang around cattle (for the insects they kick up as they graze), you’d bet they would have likely found Bison herds an acceptable substitute. In other words, had nature taken her course, in today’s southeastern South Dakota, it’s likely both birds would be around.

As it is, the “native” Upland Sandpiper is a rarity, a true delight whenever I should happen to find one around here.  Even though I have, oh, a few hundred photos of Upland Sandpipers sitting on fence posts, most are from elsewhere in the state, so when I see one around here, I can’t help but stop and take photos.

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