What Birds Eat: How to Preserve the Natural Diet and Behavior of North American Birds explains bird physiology and natural diets, including detailed profiles of their food preferences. With a robust selection of photographs and illustrations, it details more than 900 bird species in North America's natural diets, ranging from seeds, foliage, nectar, and nuts to fish, insects, crustaceans, carrion, and mammals—and sometimes other birds. What Birds Eat explores the senses that birds depend on-sight, sound, odor, taste, and touch-and their food ingestion.