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Trumpeter Swan: Largest swan in the world, completely white but with head and neck often stained rust-brown from contact with ferrous minerals in wetland soils. Bill, legs, and feet are black. Feeds on aquatic plants. Strong direct flight on steady wing beats. Flies in straight line or V formation.
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Tundra Swan: This small swan is completely snowy white. Its head and neck is often stained rust-brown from ferrous minerals in marsh soils. It has a black bill with a yellow spot at the base and black legs and feet. Diet includes aquatic vegetation and grass. Strong direct flight on steady wing beats. Flies in straight line or V formation. Most common swan in North America. Sexes are similar.
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Thick-billed Kingbird: Large flycatcher with gray-brown upperparts, darker head, and seldom seen yellow crown patch. Throat and breast are gray-washed white, and belly and undertail coverts are pale yellow. Bill is large and black. Tail is gray-brown and slightly forked, edged with cinnamon-brown.
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Thayer's Gull: Having had full species status since 1973, as of 2017, the AOU considers this gull to be a subspecies of the Iceland Gull and has lumped it there. To see this please jump to the Iceland Gull species account. New subspecies range maps for this bird will be available in the next iBird update at which time we will retire the Thayer’s Gull as it’s own species.
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