Loose Parts, 8/2/07:

So did the lessons work? Lets see...
Bill Schmoker's Nature & Birding Blog
Chickadees, nuthatches and warblers foraging their way through forests have been shown to spur the growth of pine trees in the West by as much as one-third, according to a new University of Colorado at Boulder study.So yesterday a CU publicist emailed me to see if they could use a Mountain Chickadee picture to send out with their press release. As an alum (I got my master's degree there in '01), I happily obliged, sending them a couple to choose from.
They have that if-you-breathe-too-hard-they'll-blow-apart look about them. Not sure if they're dandelion seedheads or birds!Anyway, it seem like something funny might be going on with Red-breasted Nuthatches this summer across a wide swath of the country, with early out-of-season reports from places like New York's Central Park. Maybe someone at North American Birds will connect the dots on this phenomenon, or maybe it is just "one of those things..."
A couple of days ago I hiked up the Mt. Audubon Trail in western Boulder County with Ted Floyd and Walter Szeliga. The trail climbs through spruce-fir habitat, krummholz, and alpine tundra on its way up the 13,223 foot summit in the Indian Peaks Wilderness Area. It is one of the more reliable spots in Boulder County for White-tailed Ptarmigan, and it didn't disappoint on this trek.





You'll notice that this Downy Woodpecker has red where you might not expect it- on the crown instead of on the nape. This is found in juvenal plumage- this bird was born this year and is probably not long out of the nest. Kids these days, what with their sugary breakfast habits!! In fact, the limited red tipping of the crown feathers and lack of red on the forehead in front of the eye indicates that this is a female, per Peter Pyle's information-rich Identification Guide to North American Birds, Part 1. (I hear that Part 2, the birds "up to" doves, is coming soon...) Easterners especially might also note how dark the bird looks, a result of diminished or even lack of spotting in the upper half of the folded wing (scapulars and coverts.) Rocky Mountain Downy Woodpeckers (leucurus group) differ from their eastern counterparts (pubescens group) in this way. Here are a couple more pics of the bird in a more natural setting.







This Broad-tailed Hummingbird perched nicely along the road, too.
Heading on up, I parked above the tree line as near as I could get and walked the rest of the way up onto the ridge line and into my priority block. (There is only one road leading into my block and that is down low along S. Boulder Creek, following the railroad until it enters the tunnel.) The first part of the slope has an extensive patch of shrub willows, and amidst the ubiquitous White-crowned Sparrow songs I heard the buzzy song of a Brewer's Sparrow. The question remains as to if these high-elevation Brewer's Sparrows in Colorado have dispersed up from their normal sage-shrubland habitats, or if they belong to an undocumented southern population of "Timberline" Sparrows (taverneri Brewer's Sparrows, found above timberline in Alaska and NW Canada.) Folks are working on it- probably need sonograms and/or genetic samples to solve this problem definitively. Anyway, here's the singer- looks big-billed for a Brewer's Sparrow, doesn't it?

Anise (Nitra) Swallowtail (black form). Per the Kaufman butterfly guide, this form found in the eastern part of the Rockies may be the result of past interbreeding with Black Swallowtails.
Speaking of which, here's a Black Swallowtail. Can't tell from this pic but it was distinctly bigger than the Anise Swallowtail.
Melissa Arctic. I love these harsh environment loving, cryptic butterflies. It takes these butterflies two years to mature in the short summer seasons found above timberline- they overwinter as first-stage caterpillars.
Milbert's Tortoiseshell. Flashy above, dull below!
Variable Checkerspot. Great splashes of color on the tundra- unlike many others, their underwings are brightly colored, too.



The concept is pretty straightforward- first, shoot lots of frames as fast as your camera will fire (in my case, 5 frames per second.) Then, at home I pick shots that show the different aspects that I'd like to include. Out of these, I try to pick one with suitable room around it (although if I run out of room I can enlarge the "canvas" in Photoshop and clone in more sky for background.) Then, I crop out the bird in each additional frame I'll use, and use the "duplicate layer" function in Photoshop to copy it onto the master frame. Then, I use the magic wand tool to select the sky in the copied layer and cut it out (just using the "edit-cut" command), leaving only the bird in that layer (sometimes having to adjust the tolerance level so it selects the right amount of sky, leaving only the bird behind.) Then I can move the layer with the bird in it until I get it where I want it in the sequence. Occasionally I'll rotate the layer to fit the sequence as well- I can't always keep a level frame of reference since I'm not shooting off of a tripod. Plus, my sequences are really photo illustrations, not necessarily sequential shots showing exactly where the bird was in each successive frame, and I nearly always leave out frames for various reasons. In fact, sometimes I put them together in different order than the shooting sequence because it tells the story better, in my opinion. By their very nature, swifts are tough to photograph so I was pretty pleased to get those shots, even at a distance. Frustratingly, when nimble, fast birds like these are closer in and have much better potential for detail, they are also much harder to track and focus on. I did get a couple of cool closer shots, though. This one isn't tack-sharp, but the bird is about to nab a bug in flight (total serendipity- didn't see the bug 'till I got home), as swifts are wont to do. By the next frame 1/5 second later the bug was already gone- yum!!
And one more parting swift shot...
The day wasn't all about swifts, though. Led by Ted Floyd (editor of Birding Magazine and birder extraordinaire), we tallied 95 species entirely on foot (us, not the birds), walking about 8 miles around the amazing property on the Yampa River. Fortunately, the mileage was mitigated by a near-total lack of climbing. Our steepest challenge was to get up onto and later back down off of the railroad grade. Otherwise the section of the Yampa Valley where we birded is forgivingly flat. In typical Colorado fashion, there was frost on the railroad ties as we began our hike at dawn and by lunch we were enjoying temps in the 70's. Our remarkable big-walk total was due to the convergence of many habitat types, including mid-elevation riparian, wet meadows, arid brushy hillsides, and coniferous forest. Here are a few other photo highlights from the day. Peace out- Bill




The bird seemed pretty healthy and content, considering it was thousands of kilometers away from either the pelagic or arctic tundra environs where I would expect it. It was successfully feeding on invertebrates, some quite large. I wasn't sure what could be in an ephemeral pond out on the shortgrass prairie like that, but a couple of knowledgeable correspondents (Henry Armknecht and Steve Larson) suggested that they were probably Fairy Shrimp &/or Tadpole Shrimp. I did some brief online research and both seemed plausible and indeed likely. While I didn't go into much depth in my studies, I found that both reside in ephemeral ponds, the eggs and/or embryos of both can survive complete desiccation for long periods of time- years if necessary (in fact they many species' eggs require drying before they will hatch when the water returns.) They can also survive extremes of temperatures while dried out. Some species of both groups can grow to decent size in short periods of time, with some reaching several centimeters long in just a few weeks. There are many species in these two invertebrate groups (both are crustaceans in the class Branchiopoda, Tadpole Shrimp in the order Notostraca and Fairy Shrimp in the order Anostraca), some with very narrow ranges and even endangered status and some quite common. It seems that in many settings Tadpole Shrimp will eat Fairy Shrimp, along with about everything else animal or vegetable they can find in their ponds, including each other! I did notice that some of the prey items the Red Phalarope captured were eaten quickly and pretty easily, while others required a lot of effort (dashing, lashing, thrashing, bashing, crashing, smashing and occasionally just giving up and trashing.) Perhaps the Fairy shrimp were the easier prey and the Tadpole Shrimp the troublesome items?? I did get one blurry series of the bird with a critter in its bill. I wasn't sure what I was looking at until I compared it to Tadpole Shrimp pictures, when I realized that their horseshoe crab-shaped carapace was almost certainly what I was seeing. Another acquaintance with lots of ecological experience and knowledge of invertebrate biology, David Leatherman, confirmed that the victim in this picture is indeed a Tadpole Shrimp (click on the pic to enlarge.)
While there, I also enjoyed the vigorous singing, skylarking, and chasing behaviors of many shortgrass prairie birds. Horned Larks ruled by numbers, but Lark Buntings seemed to be everywhere, too, seconded by McCown's Longspurs. But one song amongst the cacophony tweaked my radar and I turned my attention north of the pond to find a Mountain Plover skylarking, giving its display song as it glided above the horizon. A bit later, three Mountain Plovers blew by me in a heated chase, giving their little wherrt calls as they went, which took them all around the perimeter of the pond and then out of sight beyond the road to the NE. I wonder if males of the species chase females- it appeared that one bird was being pursued by two followers. After that, one of them, or another Mountain Plover, snuck in from my right to the pond's edge and walked around to where the Red Phalarope was hanging out again near the west shore in emergent vegetation. Maybe I was imagining things, but it seemed like the Mountain Plover walked down to take a look at the weird red thing that was in its pond... Sorry that this pic isn't real sharp but there was a lot of bad air to shoot though across the whole lake. I had to try, though- after all, when was the last time you saw a picture of a breeding Red Phalarope and Mountain Plover in the same frame?
I digiscoped these pics through my Leica APO-Televid 77 using a 32X WW eyepiece and Digital Adapter 2 with a new camera I got last week- a Leica C-Lux 2. I had been using the C-Lux 1, which I loved, but the great folks at Leica upgraded me to the current model. It sports a little better resolution (7 MP) but perhaps more importantly, the new sensor has a bit less noise at high ISOs. Other than re-positioning my shutter release bracket a bit, I can still use my same digiscoping rig with this camera. It shoots pretty cool video, too- I'll leave you with a little compilation of some scenes that I shot of the bird in action. The preening clip almost seems speeded up but that is just the frenetic phalarope's pace, I guess. Enjoy- Bill