Six-month summary: July–December 2010

Here is just a quick summary of casualties at the Noble Research Center from July through December 2010:

Very fat Mourning Warbler that never made it to the wintering grounds.

I detected 25 individuals of at least 16 species among the casualties. The complete list:

grasshopper sparrow – 4
ruby-throated hummingbird – 2
mourning warbler – 2
song sparrow – 2
Lincoln’s sparrow – 2
unidentified passerine (1 warbler, 1 sparrow) – 2
black-and-white warbler – 1
Carolina wren – 1
mourning dove (juv) – 1
least flycatcher – 1
common yellowthroat – 1
black-throated green warbler – 1
brown thrasher – 1
house wren – 1
red-breasted nuthatch – 1
white-throated sparrow – 1
field sparrow – 1

Because I was able to get to the NRC earlier each day during autumn than practical in 2009, I encountered more individuals that were stunned and “trapped” by the building for some time period without obvious mortal injury. Most of these birds are presumed to have eventually moved on, but it is quite likely that the house wren and one of the Lincoln’s sparrows on the “stunned” list were unsuccessful in their respective bids to escape from the confusion of the NRC, and are listed above. The bat represents the first mammalian “capture” by the NRC:

Lincoln’s sparrow – 5 (4 in one flock)
house wren – 1
common yellowthroat – 1
Nashville warbler – 1
grasshopper sparrow – 1
dark-eyed junco – 1

It’s dark when migrants like this Lincoln’s sparrow drop out of the sky and try to find a good spot in which to rest for the day. I’m beginning to think that most collisions are occurring in that last hour before sunrise.

October 2010 Summary

I checked for casualties on 25/31 days in October, and encountered the following:

1 unknown songbird
1 House Wren
2 Lincoln’s Sparrow
2 Grasshopper Sparrow
1 Red-breasted Nuthatch
1 White-throated Sparrow
1 Song Sparrow

10 October 2010 – scavenged sparrow and a mammalian surprise

I found another one of those instantly scavenged individuals yesterday, this one identifiable as a Lincoln’s Sparrow from the lone undertail covert and distal end of one wing I found:

The real excitement, however, was furnished by this little guy:

Did you see him?

This was a very much alive (though a bit waterlogged following an afternoon storm) big brown bat. I couldn’t tell if the bat was stunned from striking a window or simply ended up at this spot and was acting unobtrusive as best it could. I didn’t think it would fare well out in the open either way, so I moved the little forest sprite to a nice, protected tree well away from the NRC.

A few moments later, the bat was gone!

No worries – it crawled deep into a crevice in the main crotch of the tree.