Photo: Joe Klamar / AFP / Getty Images
Very large Mute Swans (Cygnus olor) search for food in an arm of the Danube River, covered with water plants in Vienna, Austria. Mute Swans are native to Eurasia and were introduced to North America in the mid-1800s through the early 1900s. Mute Swans in North American are usually found in controlled captive environments, but some do exist in the wild also.
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BarrytheBirder
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