- Songbirds, waterfowl, owls, shorebirds, warblers, woodpeckers,
nightjars, birds of prey - Dozens of feather groups photographed in
color A sighting in the field is just one way birders can identify bird
species. Observant nature-lovers can discover what birds are where by
examining tracks, trails, and a variety of bird sign: discarded
feathers, feeding leftovers and caches, pellets, nests, droppings, and
skulls and bones. This fully illustrated guide--the first of its kind
for North American birds--presents thorough and straightforward
instruction for identifying bird families or individual species by
careful examination of the unique sign they leave behind. It also offers
keys to the birds' behavior in the wild.