Mute Swan - In flight, wings produce loud hum in

Mute Swan - In flight, wings produce loud hum in flight unlike other swans (Cygnus olor). Found on ponds, lakes and slow moving rivers. France. Native to Eurasia. Introduced to North America and elsewhere. Can weigh up to over 20 pounds

Cygnus Loud Mute Olor Ponds Produce Swan Swans Taking Unlike

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