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.
♦ ²Occurrence, photo-identification and prey of Pacific white-sided dolphins (Lagenorhyncus obliquidens) in the Broughton Archipelago, Canada 1984-1998, Alexandra Morton, Marine Mammal Science Vol. 16, no. 1, pp. 80-93. Jan 2000