While enjoying the cool breeze out on the porch earlier this afternoon I was able to snap a few pictures . . .
I'm pretty sure this is a Ruby-throated Hummingbird (Achilochus colubris). If it isn't, then I think it is a Black-chinned Hummingbird (Archilochus alexandri). You can't really see it in these pictures because of the lighting, but he has a rather reddish (ruby) colored patch of feathers under his chin, which leads me to believe that he is the Ruby-throated rather than the Black-chinned. Hopefully one of you reading this knows more about hummingbirds than I do and can verify that for me.
After he feeds he will go and perch on this twig in my tree. If another hummingbird even gets close to the feeder he will dart down and scare them away and go back to the perch. He is very territorial and it is pretty fun to watch.