Glaucous-winged gull Larus glaucescens

Identification Tips:

Adult alternate:

Adult basic:




Similar Species:

Adults of all other species have primaries that contrast with the back color. Glaucous-winged is one of the largest and "meanest-looking" gulls and can often be distinguished just by shape. Young birds also show no contrast between the body and primaries. First-winter plumage is very similar to Thayer' Gull, which has slightly darker primaries and secondaries and a smaller bill (with shallower gonydeal angle), rounder head and smaller size. Glaucous-winged and Western gulls hydridize extensively so beware of intermediate-plumaged hybrids.