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Common Name:Gull, Bonaparte's
Scientific Name:Larus philadelphia
Area:Carter Lake Trail - Oregon Dunes National Recreation Area
Date:May 22, 2015

Bonaparte's Gulls migrate along the coastline of Oregon in the spring to breed in the arctic, and return in the fall to winter in California and further south. This is the non-breeding plumage.

Reference:Gulls of the Americas by Howell & Dunn / Birds of Oregon by Burrows & Gilligan