I have mentioned before that I participate in Project Feederwatch, a citizen science project of Lab of Ornithology of Cornell University.
The report from last year's season were included in the Autumn 2009 Living Bird mailing. We are part of the Southeast and South-Central region. There were 1204 sites reported on. The report includes the Top 25 birds for each region--these are the birds reported in the largest number of sites, not in the largest numbers.
See how many of these birds you recognize from your backyard feeder. In my case, the list here doesn't reflect two of the most common birds at my feeder: House Sparrows and White-winged Doves.