Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Whooper Swan (Cygnus cygnus) is a large Northern Hemisphere swan. It is the Eurasian counterpart of the North American Trumpeter Swan. The Whooper Swan is similar in appearance to the Bewick's Swan. However, it is larger, at a length of 140–160 centimetres (55–63 in), a wingspan of 205–275 centimetres (81–108 in) and a weight range of 7–10 kilograms (15–22 lb). 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).

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