It would help to know where you are. If you are east of the Mississippi they're probably Ruby-throats.

Looks like a Black-chinned but here's a guide for you to check out.

Here is a link that might be useful: enature- Hummingbird Field Guide

Yes, depends on where you are , eastern third of us is only rubythroat land, with rare exceptions.

Thanks everyone. I'm in Texas, so it is probably a black-chinned. I was thrown by the pink belly of what I believe is the male that visits the feeder.
E-Nature is a great site.

The belly isn't really pink. The sun is bouncing the red off of the feeder.

Well, that makes sense. Thanks, sidk.
Sherry