The East

by Jeffrey Glassberg

Published 25 March 1999
This field guide. covering the butterflies of the eastern United States to a western boundary running from the eastern Dakotas to east Texas, identifies butterflies in their habitat, and includes information on unique field marks and flight patterns, ranges, seasonal abundance, and food plants. It is beautifully illustrated with 71 colour plates, with photographs of all the butterflies native to the eastern United States. The guide will allow butterfly watchers to
identify butterflies in the field without the need to collect them. This guide, beginning a series of field guides, is a big improvement over the Audobon and Peterson guides, and one of the finest, most reliable, and useful field guides to any subject.

The West

by Jeffrey Glassberg

Published 19 July 2001
This field guide to butterflies of the western United States, west of the Mississippi River, completes Jeffrey Glassberg's large project to develop a set of photographic field guides to butterflies that actually work as field guides, for positive identification of butterflies from observation in the field. This guide and its companion volumes cover all the butterflies found within the continental United States.