Labrador Duck - The Labrador Duck was also known as a Pied Duck, a vernacular name that it shared with the Surf Scoter and the Common Goldeneye , 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 .