sexual dimorphism in the mallard

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Photo credit: © Gerald Kiefer / Alamy / Afripics
License: Royalty Free
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Keywords: anas, avifauna, biology, bird, birds, couple, daisy, drake, duck, entenpaar, fauna, female, feminine, float, format, geschlechtsdimorphismus, kulturfolger, landscape, male, mallard, masculine, meadow, pair, platyrhynchos, prachtkleid, sexes, sexualdimorphismus, stockerpel, swimmer, swimming, tarnfarbe, water, waterfowl, waterfowls, waters, zoology