A Swift Guide to Butterflies of North America
Illustrates all of the butterflies found in North America, including strays. For most species both topsides and undersides, males, females, and variants are shown. Caterpillars and caterpillar foodplants are shown for many species. Hundreds of new field marks allow easy identification of most species. The verbal descriptions are connected to the field marks by arrows, showing you exactly what to look for. Includes a caterpillar foodplant index and a quick visual index.