All the usual suspects:

Chickadees
English Sparrows
Goldfinches
Cardinals
Juncos
Downy and Hairy Woodpeckers
Mourning Doves
and I have a Cooper's Hawk working the feeders too. What the hell, he's a bird and he needs to eat too.

Plus, my nemisis (sp?), about 20 squirells. I keep hoping the hawk will grab some of these greedy little beggars.