The Birds of America, Volume 4
This edition has 65 new images, making a total of 500. The original configurations were altered so that there is only one species per plate. The text is a revision of the Ornithological Biography, rearranged according to Audubon's Synopsis of the Birds of North America (1839).
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abundant acute Adult alight Amer angle appearance approach arched band base become bill birds blended blue body branches breadth breed broad brown claw colour Columbia Common compressed considerably continued convex covered Crow dorsal line edges eggs equal extent extremely feathers feeding Feet female four fourth frequently half head hind inches inner insects kind lateral leaves longest Louisiana lower mandible Male manner margin middle moderate length muscles narrow Nature nearly neck nest never Nostrils notes observed outer pair passing Picus PLATE plumage quills remain resembles rest ridge rings river rounded season seen seldom sharp short shorter sides slender slightly species stomach straight strong tail tarsus third tongue tree twelfths twelfths long United upper mandible usually width wings winter Woodpecker woods yellow young