Edited By Roger Tory Peterson
The Peterson identification system pinpoints field marks for species recognition and comparison of look-alikes.
Eastern Birds Field Guide identifies live birds in eastern and central North America by their "field marks". Includes color plates and maps. 450 pages.
Eastern Birds' Nests Field Guide explores the nest and eggs of 285 bird species in the 26 states east of the Mississippi River. 222 color photos and drawings. 288 pages.
Western Birds' Nests Field Guide explores the nest and eggs of 520 species of birds found west of the Mississippi River. More than 400 photographs. 374 pages.