Whooper Swan Cygnus cygnus

Whooper Swan
Whooper Swan
The Whooper Swan is so called after the trumpeting "whoop-whoop" sound it makes. A large, white swan native to Eurasia, it is smaller than its North American relative, the Trumpeter Swan but larger than the similar-looking Bewick's swan. Unlike the Bewick's, the Whooper has more yellow on its bill than black, the yellow extending to its nostrils and forming an acute angle. Both Whooper and Bewick's are strong flyers migrating long distances in sub-Arctic/northern Eurasia.
Whooper Swans
Whooper Swans
Like most swans, Whoopers mate for life; they also often remain in family groups for a year to two after offspring have fledged.
Whooper Swan
Whooper Swan whooping
They can be noisy birds, especially in spring, when making their famous trumpeting whoop to claim territory and partner.
The choirmaster conducts . . .
the choir sings . . .
Choir
. . . and others are moved to join in.
Bottoms up
Mute Swan beak Mute swan
Whooper Swan beak Whooper (yellow forms acute angle)
Bewick Swan beak Bewick's (smaller, less yellow, more black)
Tundra Swan beak Tundra (North American) can have more yellow on beak or can have all black beak like the larger Trumpeter swan
Black Swan beak Black (Australian)
Black-necked Swan beak Black-necked (South American)
Coscoroba Swan beak Coscoroba (South American) - more like a goose
Trumpeter Swan beak Trumpeter (world's largest swan)