Ruby-throated Hummingbird
Archilochus colubris
Notes:

I've decided that hummingbirds and some kinds of warblers are the most difficult birds to photograph. They don't sit still.

I really want to get a decent hummingbird photo. In the photos below, they are difficult to find.

Links:
Photos:
When one tugs at a single thing in nature, he finds it attached to the rest of the world.
John Muir