![](https://webarchive.library.unt.edu/eot2008/20081106231411im_/http://nsf.gov/images/x.gif) News From the Field Caribbean Frogs Started With a Single, Ancient Voyage on a Raft From South America
![](https://webarchive.library.unt.edu/eot2008/20081106231411im_/http://nsf.gov/images/greenlineshort.jpg)
June 6, 2007
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Nearly all of the 162 land-breeding frog species on Caribbean islands originated from a single species that rafted on a sea voyage from South America about 30-to-50-million years ago, according to a DNA-sequence-analysis study. The discovery is surprising because no previous theories of how the frogs arrived had predicted a single origin and because groups of close relatives rarely dominate the fauna of an entire continent or major geographic region.
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Source Penn State
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