This profusely illustrated comprehensive key for identifying amphibians and reptiles from the continental United States and Canada incorporates a wealth of scie

A profusely illustrated comprehensive key for identifying species of amphibians and reptiles from the continental United States and Canada.

A dichotomous key (that is, one that gives the user only two choices at each level of morphological scrutiny), it is designed for use in college-level herpetolo

"The premiere reference book on the 108 species of frogs inhabiting North America north of Mexico. An unparalleled synthesis of the biology and behavior of all

From one of the most trusted names in field guides comes a new and lavishly illustrated guide to identifying North America's most common birds, mammals, insects