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			          African bullfrog - Wikipedia, the free encyclopedia
			           
 The African bullfrog (Pyxicephalus adspersus) is a species of frog in the Pyxicephalidae family. It is also known as the pixie frog due to its Latin name. https://en.wikipedia.org/wiki/African_bullfrog
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			          American bullfrog - Wikipedia, the free encyclopedia
			           
 The American bullfrog (Rana catesbeiana), often simply known as the bullfrog in Canada and the United States, is an aquatic frog, a member of the family Ranidae, or "true frogs". https://en.wikipedia.org/wiki/American_bullfrog
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			          Bullfrog (Rana Catesbeiana) - A-Z Animals
			           
 The bullfrog is one of the most widely distributed frogs across the North American continent. The bullfrog is a medium-sized frog that is best known for it's loud cow-like calls, hence it's name. http://a-z-animals.com/animals/bullfrog/
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			          American Bullfrogs  - National Geographic
			           
 Learn all you wanted to know about American bullfrogs with pictures, videos, photos, facts, and news from National Geographic. http://animals.nationalgeographic.com/animals/amphibians/american-bullfrog
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			          American Bullfrog  - ARKive
			           
 Learn more about the American bullfrog - with amazing American bullfrog videos, photos and facts on ARKive http://www.arkive.org/american-bullfrog/lithobates-catesbeianus/
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			          Giant African Bullfrogs Eating Everything in Sight - YouTube
			           
 My Pixies doing work. Video of a giant african bullfrog feeding. https://www.youtube.com/watch?v=d6YnSXVKUiw
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			          Pyxicephalus adspersus (African Bullfrog)
			           
 Information and population statistics for the African Bullfrog from IUCN Red List of Threatened Species. http://www.iucnredlist.org/details/58535/0
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			          Lithobates catesbeianus (American Bullfrog, Bullfrog, Common Bullfrog)
			           
 Information about the American Bullfrog including population statistics from IUCN Red List of Threatened Species. http://www.iucnredlist.org/details/58565/0
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			          BioKIDS -  Lithobates catesbeianus, American Bullfrog
			           
 BioKIDS - Kids' Inquiry of Diverse Species. Learn about the American Bullfrog including appearance, habitat, behavior and diet. http://www.biokids.umich.edu/critters/Lithobates_catesbeianus/
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			          National Aquarium - American Bullfrog
			           
 Come see the American Bullfrog at the National Aquarium. Find out about its appearance, diet, habitat and behavior here. http://www.aqua.org/explore/animals/american-bullfrog