- Fauna of South America
The fauna of South America consists of a huge variety of unique
animals some of which evolved in relative isolation. The isolation of South America had an abrupt end some few million years ago when the Isthmus of Panamawas formed allowing small scale migration of animals that would result in the Great American Interchange.
* [http://www.jstor.org/sici?sici=0033-5770(196812)43%3A4%3C409%3ATFMFOS%3E2.0.CO;2-Z JSTOR]
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