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Comparison of Ladder-backed Woodpecker (above) and Nuttall's Woodpecker
Description
Ladder-backed Woodpecker , Picoides scalaris (upper), and Nuttall's Woodpecker, Picoides nuttallii (lower), hand-colored lithograph
Source
Report on the United States and Mexican boundary survey, made under the direction of the secretary of the Interior by William H. Emory. (Volume on Birds, edited by Spencer Fullerton Baird.)
Date 1857-1859
Author United States Department of the Interior |
