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Yellowlegs and Sandpiper, illustration from Elon Howard Eaton, "Birds of New York"
Wyoming Bird, diatryma, skeleton, illustration from the American Museum Journal
Wyoming Bird, diatryma, restoration, illustration from the American Museum Journal
Wrens and Creeper, illustration from Elon Howard, "Birds of New York"
Woodcock bill open, shut, illustration from William Beebe, "The Birds Its Form and Function"
Woodcock attenuated outer wing fracture from William Beebe, "The Bird Its Form and Function"
Wing skeleton compared with arm from William Beebe, "The Bird Its Form and Function"
Wings, illustration from Frederick Webb Headley, "The Flight of Birds"
Wings, illustration from Frederick Webb Headley, "The Flight of Birds"
Wings, Albatross and Hummingbird from William Beebe, "The Bird Its Form and Function"
Wing, primaries and secondaries, illustration from William Pane Pycraft, "History of Birds"
Wing of Long-eared Owl, showing flight patterns, illustration from William Pane Pycraft, "History of Birds"
Wing of bird, muscles of, from R.W. Shufeldt, "Myology of the Raven"
Wing feathers, illustration from Frank E. Beddard, "The Structure and Classification of Birds"
Wing compared with human arm
Wing bones, four methods of making, from Frederic A. Lucas, "Animals of the Past"
White-throated Sparrow, effect of moisture in darkening plumage, illustration from William Beebe, "The Birds Its Form and Functi
White Pelican, illustration from "Birds of the World"
Whitebreasted Nuthatch, Brown Creeper, illustration
Water Turkey, image from Frank M. Chapman, "Camps and Cruises of an Ornithologist"
Warblers, Water Thrush, etc., illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warblers, illustration from Elon Howard, "Birds of New York"
Warbler, Mourning, illustration from Elon Howard, "Birds of New York"
Warbler, Connecticut, illustration from Elon Howard, "Birds of New York"
Walking stick
Viscera abdominal, illustration from Frank E. Beddard, "The Structure and Classification of Birds"
Vertebrate Tree of Life image from Henry Fairfield Osborn, "Origin and Evolution of Life"
Vertebrate succession, chronological chart image from Henry Fairfield Osborn, "Origin and Evolution of Life"
Vertebrae of bird, Raven, illustration, from R.W. Schufeldt, "Myology of the Raven"
Umbrella bird, image from William Beebe, "The Bird Its Form and Function"
Umbrella bird, illustration from Joseph Leopold Fitzinger, "Bilder-Atlas zur Wissenschaftlich-Populren Naturgeschichte der Wirbe
Trogon, Resplendent Quezal, illustration from "Birds of the World"
Trachea of Passenger bird, illustration from Frank E. Beddard, "The Structure and Classification of Birds"
Trachea of Birds, Rings, etc., illustration from Elliot Coues, "Key to North American Birds"
Trachea of Bird, arrangement of rings, illustration from Elliot Coues, "Key to North American Birds"
Trachea convolutions, Whooping and Sawhill Cranes, illustration from Elliot Coues, "Key to North American Birds"
Trachea Convolutions, illustration from Frank E. Beddard, "The Structure and Classification of Birds"
Towhee and Sparrows, illustration from Elon Howard, "Birds of New York"
Toucan tongue, illustration from William Beebe, "The Bird Its Form and Function"
Toucans, illustration from Joseph Leopold Fitzinger, "Bilder-Atlas zur Wissenschaftlich-Populren Naturgeschichte der Wirbelthier
Toucans, Fuertes sketches, illustration from Bird-Lore magazine
Toucan, illustration from William Beebe, "Tropical Life"
Tongues, various types, illustration from Frederic A. Lucas, "Tongues of Birds"
Tongues, various types, illustration from Frederic A. Lucas, "Tongues of Birds"
Tongues, various species, illustration from Frederic A. Lucas, "Tongues of Birds"