Global Amphibian Assessment

Amphibians in Dramatic Decline - Nearly One in Three Species Faces Extinction

About This Project

More than 500 scientists from over 60 nations contributed to the assessment. Overall, 1,856 (32 percent) of the world’s 5,743 species of frogs, toads, salamanders, and caecilians were considered threatened with extinction. Sufficient data were lacking to accurately assess the status of nearly 1,300 other species, most of which scientists believed are also threatened. Key findings were published in the journal Science on December 3, 2004.

Since 2004, new species have been assessed, and updates have been made for some previously assessed species. Complete data for each species are available in a searchable database.


In 2004, scientists from Conservation International, IUCN-The World Conservation Union, and NatureServe analyzed the distribution and conservation status of all of the world’s amphibian species known at that time. The goal of this project was to better understand the threats they face and the conservation actions needed to protect and properly manage them.


The world’s amphibian species are under unprecedented assault and are experiencing tens of thousands of years worth of extinctions in just a century. This project provided the information needed to help to prevent further extinctions and drastic declines.