BARN SWALLOW
His look pretty much says it all, as he was all alone and wouldn't move. I suspect he had a run in with a larger bird of prey or something else to cause what appears to be a wound.
NIKON CORPORATION NIKON D300, f/6.3 @ 600 mm, 1/1000, ISO 400, No Flash
copyright by Greg Stephens and Photography by Greg Stephens