Common Eider (Somateria mollissima) August 3, 2020 1800 × 1200 Common Eider (Somateria mollissima) Common Eider (Somateria mollissima) male and females, Jan 2012, Montauk. Winter and year-round. January, 2012. Montauk Point. Oceans. Winter visitor. May stay year-round.