We seem to have several kinds of woodpeckers in the area, and they like our yard and bird feeder. I tried to get some pictures this morning, and this was the best I could do in the small amount of time I had (I'm nursing 2 sick kids back to health today). I used this Woodpeckers of Texas website to identify them.
This big guy is a Pileated woodpecker. He (she?) flew from tree to tree poking his beak in different holes. There are at least 2 I've seen flying around. They are big and awesome!
I believe this one is a red-bellied woodpecker. There are several of them as well!