The Whooper Swan (Cygnus cygnus) is a large Northern Hemisphere swan. It is the Old World counterpart of the North American Trumpeter Swan. It is similar in appearance to the Bewick's Swan, but, it is larger, with a length of 140-160 cm (55-63 in), a wingspan of 205-235 cm (81-93 in) and a weight range of 8-15 kg (17.6-33 lbs). It has a more angular head shape and a more variable bill pattern that always shows more yellow than black (Bewick's Swans have more black than yellow).