Whooper Swan

The whooper swan is a large swan of the northern hemisphere, the Eurasian counterpart of the trumpeter swan, 140 to 165cm long with a wingspan of 205 to 275cm. Typical weight is 7.4 to 14kg, and the verified record was 15.5kg. Adults are pure white, the head and neck often stained rusty-yellow from feeding in water rich in tannins or iron. The bill shows more yellow than black, unlike Bewick's swan (Wikipedia, general species account).

It has a deep honking call that resembles that of geese, and despite its size is a powerful flier that can migrate hundreds or even thousands of miles to wintering sites in southern Europe and eastern Asia. The female lays two to seven eggs, incubated for about 35 days. It can be told from the mute swan by a shorter, rounded tail. The sources opened do not describe it in Nepal.