( Cygnus cygnus - Singschwan - sangsvane ) Large type of swan breeding far up north and with a call that can be heard more than a km. away. The Whooper swan talks a lot, and some people think they have so many different sounds it might make up a simple language

Watercolor of Mute swan ( Höckerschwan - Knopsvane ) One of the heaviest birds to fly the mute swans are both much celebrated in Europe - and considered an aggressive spreading, invasive species in America