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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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Tropical Shearwater: Small seabird black-brown above, on sides of neck, undertail, and on flight feathers and leading edge of underwing. Underparts, upper sides of rump, and wing linings white. Medium, blue-gray bill with slightly hooked tip. Long, slightly pointed wings. Short, pink-gray legs and webbed feet. Sexes and juvenile similar.
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