Peterson Field Guide - Western Butterflies place names This collection of eye-catching photographs

This collection of eye-catching photographs takes you on a guided visual tour through the Palm Springs and Palm Desert areas

Few mountain ranges anywhere have been as swarmed over

240 40 ft contours

High Sierra SUV Trails

Peterson Field Guide - Western Butterflies place names This collection of eye-catching photographsPaul Opler is the author of several books, including the Peterson Field Guide to Eastern Butterflies. He is a professor and senior research scientist at Colorado State University and a vice president of the North American Butterfly Association. Amy Bartlett Wright wrote and illustrated the Peterson First Guide to Caterpillars and illustrated the Peterson First Guide to Butterflies and Moths.