Robert Sargent. The ruby-throated hummingbird is one of the most attractive and engaging birds in North America. The ruby-throated hummingbird is treasured throughout the Eastern United States. This beautiful book is packed with information on the natural history of hummingbirds, their spring migration, breeding & courtship habits, feeding & foraging, social interaction & communication and fall migration, plus winter strategies. Paperback, 105 Color Photographs, 96 pages. Written by Robert Sargent, a master bird bander specializing in the banding and study of hummingbirds. Dimensions: 7" x 9" x 1/4".