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Northern Prairie Wildlife Research Center

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Species, Age and Sex Identification of Ducks Using Wing Plumage

Black-bellied Whistling Duck

Wing Character Adult Immature
Greater coverts Entirely white and broadly rounded at their tips White but slightly mottled near their tips which are pointed
Tertials Dark olive color; bluntly rounded at their tips Dark olive color, but usually slightly pointed and frayed at their tips
Lesser coverts Broadly rounded olive and usually with narrow white edging Usually taper to a point and are without edging

JPG-Adult black-bellied whistling duck JPG-Immature black-bellied whistling duck

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