I used to think this was just an insult. But it turns out there really is such a thing! See these photos I took in my backyard a few months ago. (you can click on the images to see a bigger shot). I had no idea what they were at the time. I'd never seen them before. But they were pretty and after I photographed and watched them pecking away at the power pole, I did some research.
As near as I can tell from looking at photos (and none that I found looked exactly like these birds) they are sapsuckers and look most like the Yellow Bellied to me. I'm not sure what they were doing in this part of the country (New Mexico) and I have not seen them since so perhaps they were blown a bit off course. If anyone out there knows for sure what they are let me know :)