Tundra Swan is the smallest of the Holarctic swans, a 115-150 cm (45-59 inches) long, 168-211 cm (66-83 inch) wingspan and weighing 3.4 to 9.6 kg (7.5 to 21 pounds ). In adult birds,
the plumage of both subspecies is completely white, with black legs,
and a bill that is mostly black, pink salmon with a thin strip along the
line of the mouth and depending on the subspecies more or less yellow
in the proximal part. In birds in water containing large amounts of
iron ions (bog lakes), head and neck feathers contains acquires a golden
hue or oxidized. Downy young are silvery gray above and white below.
Swans small subspecies are smaller. There is a size slightly lean with eastern birds are slightly larger, the data is only good for the West, however. These roads 3,4-7.8 kg (7.5 to 17 pounds) 6.4 kg (14 lbs) on average for men and 5.7 kg (13 pounds) in women. Measuring tarsus 9.2 to 11.6 cm (3.6 to 4.6 inches) in length, the account of 8.2 to 10.2 cm (3.2 to 4.0 inches), with an average of 9 , 1 cm (3.6 inches). Little Swan is similar in appearance to the noblest Whooper Swan (Cygnus C.) but the neck is smaller, shorter and has a more rounded head, with the standard variable account, but always as black and a yellow patch base yellow upturned nose.
Wild Swans have an account that has more yellow than black and the tip of the yellow stain is usually addressed. The Little Swan invoice template for each individual is unique, and scientists often detailed drawings of each invoice and assign names to the swans to help in the study of these birds. A clear case of hybridization between a small and a vagrant Whistling Swan was reported in eastern Siberia.
Whistling swans weigh 9.5 to 21 pounds (4.3 to 9.5 kg) - 16 pounds (7.3 kg) on average for men and 14 pounds (6.4 kg) in women - and measuring 47 -59 cm (120-150 cm) long. It differs from allopatric great trumpeter Swan (C. buccinator) of North America, far greater than the size and type of black beak particularly long, is everywhere except mouth pink line, which is stronger than in Whistling Swan.Tundra Swans have some calls and shrill sounds like a goose honking black (Branta).
The casting call that is called low and smooth bark, Bow-Wow
Whistling Swan gives a loud bark as clear trisyllabic wow-wow-wow
in flight. Moreover, the Wild Swans trumpeter and names accurately
describe your calls - a deep hoot hoot and a larger horn tone,
respectively.
Begin to reach spawning in mid-May, and leave for winter quarters
in late September. Some birds also winter elsewhere on the south coast
of the North Sea. Swans small breeds in eastern Russia migrate via
Mongolia and northern China in winter in coastal areas of Korea, Japan
and southern China, Guangdong, south and sometimes even Taiwan.