A young Whooper Swan at Frazier's Aviaries
The Whooper is the Old World cousin of the Trumpeter Swan, breeding across the entire northern Palearctic. It is distinguised from Bewick's Swan by its larger size and the yellow bill with a black tip. It is the noisiest of all the swans, constantly calling "hoo, hoo, hoo" while in flight. Unlike the Mute Swan, it tends to carry its neck stiffly erect.
Very social outside of breeding season, at that time they occupy well-defined territories.
Only the pen sits on the 5-7 greenish-white eggs. Incubation lasts for 35-40 days. Whoopers only breed well in captivity if they can have a secluded nest site.
Whooper Swan Links:
Whoopers at Roman's Acres
A pair of young Whoopers
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Direct questions and comments to Barry at FeatherSite -- questions and comments