Fourth graders understand the bird identification by sight and sound. In groups of 3-4, they use binoculars, field guide, checklist, and pencil and hike around the pond and through the woods, pointing out birds along the way.

Here is the online version of John James Audubon's "Birds of America," as written by Audubon himself in 1840. The site includes the original artwork and text descriptions of each species of bird.