I see Cornell was mentioned. If you're ever in Ithaca, NY, visit Cornell's Lab of Ornithology at Sapsucker Woods. The people at the lab are also responsible for the Merlin app that lets your phone identify birds from their vocalizations.

“Look Bullwinkle, it’s a yellow-bellied sapsucker!”

“Aw, put down something else Rock. I can’t stands a coward.”