Opinion piece of David Wake

In the last 2 decades, field biologists discovered nearly 3,000 new species of amphibians. At the end of July 2012, the total number of amphibian species hit 7,000 with the addition of a high elevation glassfrog (Centrolene sabini) from Manu National Park in Amazonian Peru. At the same time, however, the International Union for the Conservation of Nature and Natural Resources (IUCN) has identified amphibians as the major taxon at the greatest risk of extinction, with 41 percent of amphibian species at risk as of June 2012, and anywhere from 125 to 500 species already extinct. The full article here