Glaucous-winged Gull

Identification

The Glaucous-winged Gull is a large gull measuring 50–68 cm in length with a wingspan of 120–150 cm. Adults are predominantly white-headed with a white neck, breast, belly, and tail. The most distinctive feature is the silver-gray mantle (back and wings), which is darker than the Glaucous Gull but paler than both the Herring Gull and Western Gull. Notably, the primary flight feathers at the wingtips are grey, typically matching the shade of the mantle rather than contrasting sharply. Adults have bright yellow bills marked with a red subterminal spot, pink legs, and dark irises surrounded by pink orbital skin. During winter, the head and nape become darker with a mottled or smudged pattern, and the bill dulls with dark markings near the tip. Young birds are brown or gray with black beaks and require four years to develop full adult plumage.

Range & Habitat

This species is rarely found far from the ocean and is a resident along the Pacific coast from western Alaska to Washington, including the Puget Sound region. They breed on the northwest coast of Alaska during summer months and in the Russian Far East. In winter, populations shift southward along the coasts of California, Oregon, Baja California, Baja California Sur, and Sonora. The species is exceptionally rare as a vagrant to the Western Palearctic, with occasional records from Morocco, the Canary Islands, Ireland, and Britain.

Glaucous-winged Gulls are remarkably long-lived birds, typically living about 15 years, though some individuals exceed this considerably. Records include birds living more than 21 years in British Columbia and at least 22 years and 9 months in Washington, with the longevity record exceeding 37 years for a bird banded as a chick in British Columbia.

Behaviour & Diet

These gulls nest during summer, with each pair producing two or three chicks that fledge at six weeks old. They feed opportunistically along the coast, scavenging for dead or weak animals, fish, mussels, and other food scraps. In urban areas, they are notorious for their boldness around humans, readily accepting offered food and tearing open unprotected garbage bags in search of edibles. Their calls are distinctive, ranging from low-pitched "kak-kak-kak" or "wow" sounds to higher-pitched wailing calls.

Best Time & Places to See It

Glaucous-winged Gulls are year-round residents along the Pacific Northwest coast, making them reliably observable from Alaska south to Washington. Summer months offer opportunities to see breeding birds and young fledglings, while winter birding along the California and Oregon coasts may yield sightings as birds migrate southward. The Puget Sound region is particularly productive for observation. Coastal harbors, beaches, and urban waterfront areas attract these adaptable gulls, especially where food is available.

Photography Tips

Photograph adult plumage in good light to capture the distinctive silver-gray mantle and the subtle grey wingtips that do not contrast sharply with the back—a key identifying feature. Winter birds offer interesting compositional opportunities with their darker, mottled head patterns. Focus on the yellow bill with its red subterminal spot and the dark eye surrounded by pink orbital skin for detailed portraits. Young birds in brown or gray plumage provide visual contrast and tell a four-year developmental story. In the Puget Sound region, be alert to hybrids with Western Gulls (Olympic Gulls), which may show darker wingtip contrasts and heavier bills, adding variety to your portfolio.