The Labrador Duck was also known as a Pied Duck, a vernacular name that it shared with the Surf Scoter and theCommon Goldeneye (and even the American Oystercatcher), a fact that has led to difficulties in interpreting old records of these species, and also as Skunk Duck. Both names refer to the male's striking white/black piebald coloration. Yet another common name was Sand Shoal Duck, referring to its habit of feeding in shallow water. The closest evolutionary relatives of the Labrador Duck are apparently the scoters (Melanitta) (Livezey, 1995).
The extinction of the Labrador Duck is still not fully explained. Although hunted for food, this duck was considered to taste bad, would rot quickly and fetched a low price. Consequently, it was not sought much by hunters. However, it is thought that the eggs may have been over-harvested, and it may have been subject to depredations by the feather trade in its breeding area as well. Another possible factor in the bird's extinction was the decline in mussels and other shellfish on which they are believed to have fed in their winter quarters, due to growth of population and industry on the Eastern Seaboard. Although all sea ducks readily feed on shallow-water molluscs, no Western Atlantic bird species seems to have been as dependent on such food as much as the Labrador Duck (Bangs in Phillips, 1926).
Source: Wikipedia
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