Feather remains, unknown species (Bldg. 15A).

As I was noting this feather pile on my datasheet I heard a light thud on the window and a rustle in the leaves.  I looked on the ground and in the bushes, but couldn't find anything.  I thought maybe I was hearing things, or maybe someone was tapping the window from the inside.  I chalked it up to me hearing things and was ready to continue with the survey when I saw a Ruby-throated Hummingbird rise up from the bushes like a little helicopter and take off.  It must have been its lucky day.