A friend has a hummingbird feeder outside on his patio (cheers Matt!) and these little guys are darting in and out like mini missiles. Wings beating 60 - 80 times a second! At a shutter speed of 1/1600th of a second, his wings are still blurred!
They seem to be very territorial too, chasing off other hummers and swwoping really close to humans too!!
I think this species is Anna's Hummingbird but I could be wrong, I don't know much about birds.