I gave up bird feeders a couple years ago, as we started to get visitations from rats, stray cats and a very determined raccoon. I didn't mind feeding the squirrels as well as my birds, but the rest of the not-so-wildlife were too much.

Y'all might be interested in looking at Cornell Ornithology Lab's Project Feeder Watch. They are enlisting folks all over the country to submit their feeder bird lists. Visit their website here:

http://www.birds.cornell.edu/pfw/