As I’m about to head out for a conference this week, spring and summer monitoring comes to a close. I’ll begin August 2017 the 9th consecutive year of (mostly) daily monitoring for window casualties at the Noble Research Center on the campus of Oklahoma State University in Stillwater, Oklahoma, USA.
It’s been a busy spring.
Beginning Mar 1st, here’s what has turned up at the Noble Research Center.
Indigo Bunting – 5
Painted Bunting – 5
Ruby-throated Hummingbird – 3
Lincoln’s Sparrow – 2
Mourning Dove – 2
Nashville Warbler – 2
Orange-crowned Warbler – 2
Baltimore Oriole – 1
Chipping Sparrow – 1
Eastern Meadowlark – 1
House Wren – 1
Northern Parula – 1
Tennessee Warbler – 1
Yellow-billed Cuckoo – 1
That’s 28 individuals of 14 species, and damn, that is disheartening.
On the plus side, my commitment to checking almost every day has put me in position to save a few birds by getting them safely away from the building and taking them someplace secure to rest and recuperate for a bit. I can’t guarantee that all 6 of these survived the ordeal, but they seemed to be in good shape when I last saw them:
I was out of town from 21–30 June and no surveys were run during that time. On June 30th, however, I heard from Dawn Brown and Corey Riding that there were three casualties at the southwestern alcove of the Noble Research Center: a badly decayed Northern Parula (adult male), a female Ruby-throated Hummingbird, and a female (with brood patch!) Indigo Bunting. It’s possible that the bunting came in on the 30th, but the others were clearly killed prior to that date. (Photos by Dawn Brown.) This is officially the first Northern Parula found on the project.
With special guest stars James O’Connell and David Mallen, today’s survey turned up a male Indigo Bunting and a trapped Yellow Warbler at the main north entrance. (No photo of the warbler; it was a male.)
Let’s take a closer look at that Indigo Bunting:
He’s pretty blue, but his molt limits reveal him to be a second year (SY) male.
Those three big feather visible on the folded wing are the tertials (aka, secondaries 7, 8, and 9 from outer to inner.
Tertials from above. On the right wing, 7 and 9 are brownish and worn but 8 is fresh and blue/black. Tert #8 has been replaced but 7 and 9 are originals from when this bird was a baby last summer. On the left wing, 8 and 9 have been replaced but #7 is original.
Paper plate and packing tape makes it a bit easier to see some things.
Left wing: alulua, greater coverts, secondaries 5 and 6, and terts 8 and 9 have been replaced. Primary coverts, primaries, and secondaries 1,2,3,4, and 7 are orignal.
Close-up of head showing trauma to lower mandible from collision.
The multiple obvious molt limits on this bird illustrate two generations of feathers on the same individual, some of which grew in last summer and some which have come in quite recently. This confirms the age of the bird as second year (SY).