Roger Tory Peterson's unique system shows exactly what features to look
for to tell one species from another. Peterson Field Guides are designed
to work in the field, and every illustration, every word, is directed to
that end. For each Field Guide, an author with expertise in the subject
and an experienced artist work closely with the editors to ensure that
both text and illustrations are accurate. As the most comprehensive and
in-depth guide to North American mammals, this book covers all the
mammals found in North America north of Mexico, including those that
live in near-shore waters. The only guide to include paintings and
photographs of the animals as well as photographs of mammal skulls, it
has 80 color plates, plus 46 additional color illustrations and
black-and-white drawings, nearly 400 range maps, and more than 100 color
photographs.