• Bird Guide: Land Birds East of the Rockies, from Parrots to Bluebirds
• Bird Guide: Water Birds, Game Birds, and Birds of Prey East of the Rockies
• Flower Guide: Wild Flowers East of the Rockies: (Revised and with New Illustrations)
• The Bird Book: Illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs.