English: Size comparison of the giant penguin Anthropornis nordenskjoeldi. The diver silhoutte is modified from File:Scuba33.jpg (which is by NOAA and in the public domain) and is scaled to a height of 1.8 m (5.9 ft).

References

• Ksepka, Daniel T.; Bertelli, Sara; Giannini, Norberto P. (2006). "The phylogeny of the living and fossil Sphenisciformes (penguins)". Cladistics 22: 412-441. DOI:10.1111/j.1096-0031.2006.00116.x.
• Myrcha, Andrzej; Jadwiszczak, Piotr; Tambussi, Claudia P.; Noriega, Jorge I.; Gaździcki, Andrzej; Tatur, Andrzej; del Valle., Rodolfo A. (2002). "Taxonomic revision of Eocene Antarctic penguins based on tarsometatarsal morphology". Polish Polar Research 23 (1): 5-46.
• 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". Science 330 (6006): 954-957.