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♦ ¹Diet of the Humboldt penguin (Spheniscus humboldti) in northern and southern Chile, C. Herling, B. M. Culik, J. C. Hennicke, Marine Biology (2005) 147: 13–25
♦ ²"Food and Feeding Biology of the South American Tern during the Nonbreeding Season", Marco Favero, M. Susana Bó , M. Patricia Silva R. and Carlos García-Mata, Waterbirds: The International Journal of Waterbird Biology Vol. 23, No. 1 (2000), pp. 125-129