The Rabb's fringe-limbed tree frog, which only became known to scientists four years ago, is one of 1,895 amphibian species that could soon disappear from the wild, says the IUCN Nearly 50,000 animals and plants were surveyed for this year's "red List" of endangered species and 17,291 of them are threatened with extinction. And here are the ten countries with the most endangered species in them