=A guide with illustrations or photographs for identification
Very good paperbacks in slipcase. Slipcase has a split at the top and bottom. Volume I: Status, Distribution, and Taxonomy. Volume II: Field Guide, contains 96 full-color plates and facing pages of descriptive text, a color map of Ecuador, 2 line drawings of bird anatomy, 115 silhouette outlines, and nearly 1600 distribution maps. All species are illustrated in full color, including migrants and vagrants and visually distinctive subspecies. The text focuses on the field identification aspects of each species, including their behavior, vocalizations, and nest appearance.