Common Eider (Somateria mollissima) - 14Jan2018 and 19Dec2015
The Common Eider is a bird I know well. My brother lives in Maine so I have seen the many variations in plumage these birds offer. Its rare to get an adult male in NC, but here is one from the Outer Banks, NC in 2018.
Here is a more typical brown immature male from Wrightsville Beach.