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Common Merganser Identification

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The Four Keys to ID

  • Size & Shape

    These are large, long-bodied ducks with thin, pointed wings. Their bills are straight and narrow, unlike the wide, flat bill of a “typical” duck. Females have shaggy crests on the backs of their heads.

    Relative Size

    Smaller than a Canada Goose; slightly larger than a Mallard.

    Relative Sizebetween crow and goosebetween crow and goose

    • Both Sexes
      • Length: 21.3-27.9 in (54-71 cm)
      • Weight: 31.8-76.2 oz (900-2160 g)
      • Wingspan: 33.9 in (86 cm)