References
Angelier, F. d. r., C. Barbraud, et al. (2006). "Kidnapping of chicks in emperor penguins: a hormonal by-product?" Journal of Experimental Biology 209(8): 1413-1420.
Jouventin, P., C. Barbraud, et al. (1995). "Adoption in the emperor penguin, Aptenodytes forsteri." Animal Behaviour 50(4): 1023-1029.
Wienecke, Barbara. "The Emperor penguin: Aptenodytes forsteri.". Web. 15 Oct 2011. <http://www.emperor-penguin.com/emperor.html>.
Images from http://www.photovolcanica.com/PenguinSpecies/Emperor.html
