Join thousands of FeederWatchers who help monitor birds that winter in North America each year. Project FeederWatch, run by the Cornell Laboratory of Ornithology, began in the late 1980s and has been providing valuable data on range expansion and population declines.
Participation doesn't require Internet access or use of a computer. The only requirement is watching your bird feeder(s), or anywhere else you can consistently make observations, on two consecutive days. You can count birds as often as once a week though less often is fine. The amount of time you watch is up to you.
Cornell also runs other citizen scientist projects including NestWatch, eBird, Celebrate Urban Birds, the Great Backyard Bird Count, and Habitate Network.