1. BirdsEye Developed by the Cornell Lab of Ornithology, BirdsEye has entries on hundreds of the most frequently seen North American bird species and includes images and bird sounds. It helps to guide avid watchers to birds in their area, based on sightings submitted online to eBird.org, a project of Cornell University and the National Audubon Society. Scientists use these observations to figure out the birds’ range, movements and abundance.