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10 animals presumed extinct in the last decade

By: Laura Moss on Jan. 5, 2011, 12:20 p.m.
Holdridge's toad

Photo: Wikimedia Commons

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Holdridge's toad

The Holdridge's toad was a species endemic to the rainforests of Costa Rica, but it was declared extinct in October 2008 because the animal has not been seen since 1986. Regular surveys and extensive searches from 2000 to 2007 failed to locate the species. The main cause of the toad's population decline and extinction is likely chytridiomycosis, an amphibian disease, perhaps in collaboration with the effects of climate change.