Scientific name: Cygnus olor
Size: Whoopers are about the same size as mute swans, around 150cm in length and up to 14kg in weight
Distribution: During the winter months Whooper Swans can be found throughout most of Scotland, Northern Ireland, mid to north Wales, northern England and parts of East Anglia
Months seen: Late September to April
Life Span: Can be up to 23 years, however many die before they are ten (source BTO)
Habitat: Usually found in damp grasslands, marshes, agricultural land, lakes and reservoirs
Food: Grass and other vegetation such as the roots of aquatic plants
Special features: Whooper swans have a yellow patch which extends along almost the full length of the bill. Bewick's Swans have a similar yellow patch but it does not extend so far down the bill. Whoopers tend to hold their necks much straighter than mute swans and they have a bugle-like call (hence the 'Whooper' name).
Although most of the Whooper Swans arriving in the UK come from Iceland, they also breed right across Scandinavia and Russia.