- Medium-sized to small gull.
- Small, unmarked yellow bill.
- Head and underparts white.
- Back medium gray.
- Wingtips black, without white spots, as if dipped in ink.
- Legs black.
Immature DescriptionJuvenile with white underparts, gray back, gray patches on nape and crown, dark spot at the ears, black collar, black wingtips, and a dark bar across the wing. Wings show a dark "M" pattern in flight. Tail white with a black tip. Legs black.
- Both Sexes
- Length: 15.0-16.1 in (38-41 cm)
- Weight: 10.8-18.5 oz (305-525 g)
- Wingspan: 37.0 in (94 cm)