Common whooper / Singschwan (Cygnus cygnus)

Whooper swan, Iceland. 2015-06-03 16.01.16 Iceland
Classification: Genus Swans (Cygnus); Tribe Swans (Cygnini); Subfamily Anserinae; Family Waterfowl (Anatidae)
This bird appears across the great seas in the following continents: Europe, North America.
Deutschland: Zugvogel, Wintergast RL R
Vocalization: Quite vocal. Trumpet-like clear honks of half a second length most frequent in flight and take-off/landing. Often voiced with a register break. [Link]
Physical details: length=145-160 cm, wingspan=218-243 cm, weight=8500-10000 g
Habitats: River and lake

First documented observation : 2015-06-03 in Iceland.