Spring staging of Eiders Somateria mollissima in some Swedish east coast archipelagos and at Gotland 2009 and 2010.
The Eider Somateria mollissima is a commonbreeding species in the Baltic. In 2008, Ottossonet al. (2012) estimated that the breeding populationof Eiders in the archipelagoes of the four Swedishcounties of Kalmar, Östergötland, Södermanlandand Stockholm was in the order of 103 000 pairs,whereas the breeding population around Gotlandwas about 6000 pairs. The distribution of breedingEiders in several
