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Courtesy of UC Berkeley, Bancroft Library
http://www.oac.cdlib.org/ark:/13030/k66t0tgr/?order=1

Title:

Molothrus ater. Brown-headed Cowbird.

Description:

"Nat. Size, Mazatlan, Nov. 11, 1868" --Two adults with juvenile bird.

Contributing Institution:

UC Berkeley, Bancroft Library