I'm not exactly sure what type of bird this is...small wren variety I believe. This peticular one has over the last few weeks developed a taste for hummingbird food and the hummingbirds gladly share. Since the windows have screens over them, clarity is not present, but I think you will concur this is not a hummingbird.
This little guy lands on the roof and checks things out. Then flys under the eave to the hummingbird feeder and chows down.