Attributes / relations provided by
♦ ¹Food of emperor penguins (Aptenodytes forsteri) in the western Ross Sea, Antarctica, Y. Cherel and G. L. Kooyman, Marine Biology (1998) 130: 335-344
♦ ²del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.