From their website:
The EDGE of Existence programme aims to conserve the world’s most Evolutionarily Distinct and Globally Endangered (EDGE) species by implementing the research and conservation actions needed to secure their future.
They have a list (with photos) of their top 100 endangered species – there are some truly amazing animals . . . that need your help. (wink wink, nudge nudge). I highly recommend you go to the EDGE website to find out more.