The Holdridge's toad was a species endemic to the rainforests of Costa Rica. While it was declared extinct in 2004 because the animal has not been seen since 1986, surveys in 2012 resulted in the toad's status being upgraded to critically endangered. Its population size is likely less than 50 individual toads. 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.
This gallery was originally published in January 2011 and has been updated with new information.