At least a quarter of the world’s approximately 8,000 known species of amphibian are recognized as threatened and at risk of extinction. But due to a lack of data on many amphibian species, only about 44 percent of amphibians have up-to-date assessments on their risk of extinction, compared to nearly 100 percent of both birds and mammals. Now, researchers reporting May 6 in the journal Current Biology have used known ecological, geographical, and evolutionary attributes of these data-deficient species to model their extinction risk—and their assessment suggests that at least another 1,000 species are threatened.