I put a hummingbird feeder outside my window. I think I have never seen more than one in my entire life before I had to stay to care for mom in Maine. After a few weeks three distinct birds began to visit several times an hour. This video is of one of them. Color me wicked happy!
I think they are a family of Ruby-Throated Hummingbirds, and I think this one is skittish as the feeder environment changed because I took the window screen off to get a better video. 
ETA, if you crank the audio you can hear the wings hum. 
