Attributes / relations provided by
♦ ¹Food of Northwest Atlantic Fishes and Two Common Species of Squid, Ray E. Bowman, Charles E. Stillwell, William L. Michaels, and Marvin D. Grosslein, NOAA Technical Memorandum NMFS-NE-155 (2000)
♦ ²The diet of king eiders wintering in Nuuk, Southwest Greenland, with reference to sympatric wintering common eiders, Flemming R. Merkel, Anders Mosbech, Sarah E. Jamieson, Knud Falk, Polar Biology Volume 30, Number 12, 1593-1597 (2007)