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Harlequin Duck. 1. old Male. 2. Female. 3. Young male.
Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
259. The Harlequin Duck (Fuligula histrionica). 260. Ditto, immature.
Public domain scan of 19th-century zoological illustration, free to use, no copyright restrictions image
Histrionicus torquatus. Harlequin Duck.
Public domain scan - Bird, 19th-century zoological illustration print, free to use, no copyright restrictions image - Picryl description