Adult female, juvi male Ruby-throated Hummingbird
I was fortunate last Sunday to sit and watch the interaction of this juvi male (right) and adult female (left) as he begged to be fed. They spent about 5 minutes together and I managed several captures of the action....she never did feed him.
http://i88.photobucket.com/albums/k1...s/_MG_9544.jpg
Canon 7D, 500mm f/4L, manual mode, 1/250" @ f/13, ISO 400
By the end of the encounter I was at f/16 and 1/320 @ 640 ISO but the adult female (on the left) still wasn't completely in focus.