he Mute Swan is a species of swan, and thus a member of the family Anatidae
. The original breeding grounds of these birds are in the British Isles, northern Europe and north central Asia. They have been heavily domesticated in Europe and introduced as domestic waterfowl for parks and gardens in North America. Mute swans are monogamous and often reuse the same nest each early spring, restoring or rebuilding it as needed. They are large and aggressive birds. Adults grow to 1,58m in length with wingspans up to 2,5m. The mute swan is not really mute; it does make a soft snorting call and it hisses loudly when it is threatened; the most familiar sound of the bird is the vibrant throbbing of the wings in flight – this sound is unique to the species, and can be heard from a range of 1 to 2 km (0.6 to 1 mi). Cygnus olor can live up to 30 years of age.
Mute swans on Salotė lake in Vilnius