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Mating pair spotted at the Billy Frank Jr. Nisqually National Wildlife Refuge.
Thayer's gull is distinguished from the Herring gull by their dark eyes.
Adult Thayer's gull in nonbreeding plumage has a pale gray mantle, with ...
This is a non-breeding adult of the subspecies "Thayer's" There were very ...
First winter Thayer's subspecies. There were numerous of these among some ...