Chalk up another second-year male Indigo Bunting as a window-kill victim at the Noble Research Center. This bird had fat = 1 and CP = 2.
Sad to think that this spectacular specimen of an ASY male (fat = 2) Indigo Bunting safely crossed the Gulf of Mexico a few days ago but could not safely navigate the Noble Research Center.
Indigo Buntings, of course, have no blue pigment. Blue is produced by birds through light reflectance – it’s structural color, not pigment.
You might think, then, that Indigo Buntings would look really cool in UV light. They don’t, unless you think charcoal looks cool!
Yesterday (Friday 4/21/17) dawned stormy after an equally stormy night. We picked up nearly 2 inches of rain (+ some hail!) and enjoyed several hours of lightning and thunder. It was dicey enough – and I busy enough – that I skipped Friday’s morning survey.
Saturday, Earth Day (!) was misty, windy, and cool but mostly dry. After a morning field trip, I checked the Noble Research Center and found the fifth Orange-crowned Warbler of the survey. (Recall, that Thursday, 4/20, produced the fourth.) It is tantalizing – and sad! – to think of two birds traveling together and dying together, especially considering that the collision took place at the same spot on the building. I don’t think, however, that this ASY, fat = 0, probable female had been in place since Thursday. She was much too dry to have lain out in the open during Friday’s deluge. So I think she really did come in overnight and if not traveling with Thursday’s male, evidently following a similar route.
ASY-U, fat = 1
With sample sizes so small, any repeat of the same species in a week looks like a pattern. Here’s what eBird reveals about Clay-colored Sparrow migration this spring:
February 2012 records:
Yep, it sure looks like Clay-colored Sparrow migration kicked in this month, with birds passing right through Stillwater.