Geographical distribution of Common goldeneye.    Breeding  Nonbreeding
BirdLife International. 2016. Bucephala clangula. The IUCN Red List of Threatened Species 2016: e.T22680455A85989591. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22680455A85989591.en. Downloaded on 28 June 2018.
Cephas