Appearance
Pacific Gulls are the only large gulls in their range, besides the occasional Kelp Gull. This species can range in length from 58 to 66 cm and span 137 to 157 cm across the wings.They typically weigh from 900 to 1,180 g. This species is mostly white, with dark wings and back, and a very thick, powerful, red-tipped yellow bill.
Young birds are mottled-brown all over, and attain their adult plumage only gradually: by its fourth year, a young Pacific Gull has usually become difficult to tell apart from an adult bird.
Naming
There are two subspecies: the nominate eastern race prefers sheltered beaches, the western race ''georgii'' is commonly found even on exposed shores. Both subspecies nest in pairs or loose colonies on offshore islands, making a cup of grasses and sticks in an exposed position, and laying two or three mottled brown eggs.References:
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