Sri Lanka’s Horton Plains slender loris was thought to be extinct since 1937. However, in 2009 two lorises were photographed and examined. Although they aren’t extinct, they are extremely endangered. Scientists estimate that there are fewer than one hundred of the lorises living in the cloud forests of central Sri Lanka. “Potentially this is the rarest primate we’re aware of today,” said Craig Turner, a conservation biologist for the Zoological Society of London.

Read more about the Horton Plains slender loris on National Geographic News.

Get the facts on animals on National Geographic Kids.

Photograph courtesy ZSL