Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

Swan nesting next to boat, Gourock, Firth of Clyde, Inverclyde, Scotland, United Kingdom, Europe

A Mute Swan (Cygnus olor), in the marshes at Ham Wall National Nature Reserve, one of the Avalon Marshes nature reserves, near Glastonbury, Somerset, England, United Kingdom, Europe

Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

Swan on nest, United Kingdom, Europe

Mute swan (Cygnus olor) on its nest at the Abbotsbury Swannery, Dorset, England, United Kingdom, Europe

Mute swan (Cygnus olor) on its nest at the Abbotsbury Swannery, Dorset, England, United Kingdom, Europe

Mute swan (Cygnus olor) on its nest at the Abbotsbury Swannery, Dorset, England, United Kingdom, Europe

Mute swan (Cygnus olor) on its nest at the Abbotsbury Swannery, Dorset, England, United Kingdom, Europe

Adult whooper swan (Cygnus cygnus) pair on nest near Lake Myvatn, Iceland

Adult whooper swan (Cygnus cygnus) pair on nest near Lake Myvatn, Iceland

mute swan

Adult whooper swan (Cygnus cygnus) pair on nest near Lake Myvatn, Iceland

A pair of Mute Swans nesting in the Lake District, Cumbria, England, United Kingdom, Europe

Mute swan (Cygnus olor) eggs in a birdnest, Frankonia, Bavaria, Germany, Europe