Glaucous-winged Gull illustration
Birdsong field guide

Glaucous-winged Gull

Larus glaucescens

A large, heavy-billed gull of the Pacific Northwest, characterized by its distinctive pale gray wingtips that match the color of its mantle.

What it sounds like

A series of loud, harsh, and somewhat nasal 'kyow' or 'glayer' notes, typically lower in pitch than the Herring Gull.

Reference call, compare with what you heard
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Rec. Peter Ward and Ken Hall · United StatesCC BY-NC-SAXeno-canto

Field notes

  • Adults lack the black primary wing-tips found in most other large gulls, showing instead a uniform pearl-gray coloration across the upperwings.
  • They hybridize extensively with Western Gulls in the Pacific Northwest, producing fertile offspring colloquially known as 'Olympic Gulls.'
  • This species follows a 'four-year' plumage cycle, transitioning through complex mottled brown stages before reaching adult plumage.
  • They are highly opportunistic foragers, known to drop hard-shelled mollusks onto rocks or pavement from the air to break them open.
  • During the breeding season, they are often found nesting on offshore islands, but they also frequently utilize urban rooftops and piers.
Habitat
Coastal waters, rocky shores, estuaries, beaches, and urban waterfronts.
Range
North Pacific coast from the Bering Sea and Alaska south to Baja California in winter.

Similar & commonly confused birds

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