31 May 2017 – Indigo Bunting

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.

28 April 2017 – Indigo Bunting

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!

Screen Shot 2017-04-28 at 9.34.19 AM

22 April 2017 – Orange-crowned Warbler (yep, another one)

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.

25 April 2012 – Clay-colored Sparrow

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:

March 2012:

April 2012:

Yep, it sure looks like Clay-colored Sparrow migration kicked in this month, with birds passing right through Stillwater.