Attributes / relations provided by
♦ ¹del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ²Intraspecific dietary variation in the short-beaked common dolphin Delphinus delphis in the Bay of Biscay: importance of fat fish, Laureline Meynier, Claire Pusineri, Jérôme Spitz, M. Begoña Santos, Graham J. Pierce, Vincent Ridoux, MARINE ECOLOGY PROGRESS SERIES Vol. 354: 277–287, 2008