Medium-sized stocky seabird. Breeding adults have a characteristic "horn" that protrudes from its orange bill and two white plumes on its face. Dark gray above and paler gray below.
Nonbreeding birds appear dark overall. Some nonbreeding birds may have reduced white plumes on the face.
Breeding adults have a characteristic "horn" that protrudes from its orange bill. White facial plumes not always visible on breeding birds. Note yellow eye.
Stocky seabird with a portly whitish belly. Flight often looks labored.
Adult DescriptionMedium-sized, stocky waterbird. All dark gray, except for white belly. Breeding adult has vertical white projection at base of orange bill, and two thin white plumes on face.
Immature DescriptionSimilar to non-breeding adult, with dusky bill and a reduced "horn."
Relative Sizebetween robin and crow
- Both Sexes
- Length: 11.0-11.4 in (28-29 cm)
- Weight: 12.3-21.9 oz (350-620 g)
- Wingspan: 23.2-24.4 in (59-62 cm)
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