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♦ ¹Yolanda Van Heezik (1990) Diets of yellow-eyed, Fiordland crested, and little blue penguins breeding sympatrically on Codfish Island, New Zealand, New Zealand Journal of Zoology, 17:4, 543-548
♦ ²Diet composition, continuity in prey availability and marine habitat – keystones to population stability in the Snares Penguin (Eudyptes robustus), Thomas Mattern, David M. Houston, Chris Lalas, Alvin N. Setiawan and Lloyd S. Davis, Emu, 2009, 109, 204–213