Robust crow-sized seabird that is black above and white below. A thin white line marks its face and thick black bill during the breeding season.
Nonbreeding birds have a white throat and cheek that extends up behind the eye.
Robust crow-sized seabird that rapidly flaps its narrow and pointed wings. Often seen flying in small groups.
Breeds in colonies on rocky coastlines.
Breeding birds have a thin white line on their thick black bill and another thin line extending from the bill to the eye.
- Medium-sized waterbird.
- Black back and head, white underside.
- Stout, deep, round-tipped bill.
- Throat white in nonbreeding plumage, with some white on face.
Immature DescriptionSimilar to nonbreeding adult, but with shorter, shallower bill without white lines or grooves.
- Both Sexes
- Length: 16.9 in (43 cm)
- Weight: 17.8-31.4 oz (505-890 g)
- Wingspan: 24.8-26.8 in (63-68 cm)
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