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♦ ¹Jackson, S. (1988). Diets of the white-chinned petrel and sooty shearwater in the southern Benguela Region, South Africa Condor 90, 20–28
♦ 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