The Tundra Swan (Cygnus columbianus) is a small Holarctic swan. The two taxa within it are usually regarded as conspecific, but are also sometimes split into two species, Cygnus bewickii (Bewick's Swan) of the Palaearctic and the Whistling Swan, C. columbianus proper, of the Nearctic. Birds from eastern Russia (roughly east of the Taimyr Peninsula) are sometimes separated as the subspecies C. c. jankowskii, but this is not widely accepted as distinct, most authors including them in C. c. bewickii. Tundra Swans are sometimes separated in the genus Olor together with the other Arctic swan species.
Bewick's Swan is named after the engraver Thomas Bewick, who specialised in illustrations of birds and animals.
Read more about Tundra Swan: Description, Distribution, Ecology
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... The Trumpeter Swan is the largest extant species of waterfowl ... The adult Trumpeter Swan is all white in plumage ... As with a Whooper Swan, this species has upright posture and a straight neck at all times ...
... The Whistling Swan is the most common swan species of North America, estimated to number almost 170,000 individuals around 1990 ... in the birds' wintering areas the eastern Whistling Swan populations on the other hand seem to be increasing somewhat, and altogether its numbers seem ... Bewick's Swan remains far less known the European winter population was estimated at 16,000-17,000 about 1990, with about 20,000 birds wintering in East Asia ...
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