Medium-sized bulky gull. Breeding birds are uniquely marked with a dark gray body, a white head, and a red black-tipped bill.
Nonbreeding adults are gray overall with a darker gray back and a red bill with a black tip.
Breeding adult with Sanderling
During the nonbreeding season, Heerman's Gulls typically hunt offshore for schooling fish or loaf on beaches, rocky shorelines, or estuaries.
Medium-sized gray gull unlike any other gull. Nonbreeding birds have a red bill with a black tip.
First winter gulls are smooth brown overall with a bicolored bill.
Juveniles have a sooty-brown head and a scalloped looking back. Note heavy bicolored bill.
Smooth gray overall with a white head, gray rump, and black tail.
First winter birds are dark brown overall.
- Medium-sized gull.
- Body gray.
- Back darker.
- Head white.
- Bill red.
Immature DescriptionJuvenal plumage: Uniformly sooty brown all over. Buff edges to feather tips, giving scaly look. Bill two-toned, with pale flesh base and black tip. Eyes dark. Legs black.
First winter (Basic I): Uniformly sooty brown all over. Bill two-toned, with pale flesh base and black tip. Eyes dark. Legs black. Wing feathers and tail black.
Second winter (Basic II): Body sooty gray. Head and nape slate black. Eyes with thin, pale white crescents above and below. Secondaries and tertials dark with white tips. Tail black with narrow white band at tip.
Second summer (Alternate II): Imperfect whitish hood. Body sooty gray. Eyes with thin, pale white crescents above and below. Secondaries and tertials dark with white tips. Tail black with narrow white band at tip.
- Both Sexes
- Length: 18.1-20.9 in (46-53 cm)
- Weight: 13.1-22.7 oz (371-643 g)
- Wingspan: 40.9-45.3 in (104-115 cm)
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