Covers every bird species in North America, as well as all the migrants that fly through. The entries are organized by 82 family groups, according to American Ornithological Union guidelines. Within a family, each separate bird entry has dozens of identification tips and illustrations on species' genders, age groups, behavior, habitats, nesting and feeding habits, and migration routes. Includes a quick-find index for the most common bird groups, text by numerous birding experts, range and migration maps, photographs as well as illustrations by expert artists, and a full glossary.--From publisher description.