More than 350 species of birds are known to visit backyard feeders in North America. Some 170 species regularly dine at feeders.
These astounding numbers were derived from data collected by the thousands of citizen scientists that have participated in Project FeederWatch.
This ongoing study is sponsored by The Cornell Laboratory of Ornithology, Bird Studies Canada, The National Audubon Society, and The Canadian Nature Federation.
How many species of birds do you feed at your feeders?