Large, heavy-bodied seabird with a hefty yellow bill. Adults are all white with black primaries and secondaries and a black tail. Note black mask.
Large, heavy-bodied seabird with a hefty yellow (greenish yellow on Juveniles) bill. Juveniles have a brownish head and neck, a dark back, and a white belly.
Flies on long stiff wings. Note black primaries, secondaries, and tail feathers.
Immatures have a mottled brown and white neck and back. Note mostly white underwings in flight.
Immatures have brownish mottling on the head and back with a distinct white collar.
The amount of brown color on the neck and back of immatures varies depending on age, some are solid brown whereas others have extensive mottling.
- Large waterbird.
- White with black tail and black along back of wings.
- Long, pointed, yellowish bill.
- Long pointed tail.
- Long pointed wings.
- Dark face mask.
Immature DescriptionJuvenile has dark head, back, and wings, with a white collar, a white rump, and a clean white underside.
Relative Sizegoose-sized or larger
- Both Sexes
- Length: 29.1-33.9 in (74-86 cm)
- Weight: 45.9-82.9 oz (1300-2350 g)
- Wingspan: 63.0 in (160 cm)
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