Frank Gill
Contributor
Director of Science, National Audubon Society; President, American Ornithologists Union. Author of Ornithology and others.
Primary Contributions (8)
Passeriform, (order Passeriformes), any member of the largest order of birds and the dominant avian group on Earth today. The passeriform birds are true perching birds, with four toes, three directed forward and one backward. Considered the most highly evolved of all birds, passerines have…
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Publications (1)
Ornithology
Taking an evolutionary approach to bird science, Ornithology incorporates the latest research while featuring an exquisite program of drawings.