English: Size comparison of the giant penguin Inkayacu paracasensis. The diver silhoutte from File:Scuba33.jpg, which is by NOAA and in the public domain.
References
Clarke, Julia A.; Ksepka, Daniel T.; Salas-Gismondi, Rodolfo; Altamirano, Ali J.; Shawkey Matthew D.; D'Alba, Liliana; Vinther, Jakob; DeVries, Thomas J.; Baby, Patrice (2010). "Fossil evidence for evolution of the shape and color of penguin feathers". Science330 (6006): 954-957.
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