Adult male in alternate plumage is unmistakable. Females, immature and eclipse-plumage males could be confused with Black Ducks, Gadwalls and Mottled Ducks, but note the blue speculum with white borders on both sides. Gadwalls are also distinctive in thei. Subjects: animals; aves; Birds; Birds; duck;ducks;Waterfowl; New Jersey. . 1998 - 2011.

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Keywords: animals, aves, birds, duck, ducks, jersey, waterfowl