This edition of A Field Guide to the Birds, the flagship book of the Peterson Field Guide Series, is more than a revision; it is completely new, with 136 plates, as against 60 in the previous edition. Every illustration is new or redrawn. All species are now shown in color; some are repeated in monochrome, but only when flight patterns are more clearly diagnosed in that way. There are also 390 three-color maps, a new feature.