This little guy, some sort of a warbler, came driving into the kitchen window early in the morning while i was having coffee……sine crash helmet!
He was knocked cold, and at first it didnt look good. His eyes were shut, but then he stiffened his legs and grabbed my finger.
I sat with him in my hand for a few minutes and he came around……opened his eyes and kept twitching his neck.
I sat him on the hammock folded on the chair and in another few minutes he took off into the forest.
Right as rain! 
