"We are facing an extinction crisis, " said Jane Smart, director of the biodiversity conservation group with the International Union for the Conservation of Nature (IUCN).

BBC: World's biodiversity 'crisis' needs action, says UN

"This update offers both good and bad news on the status of many species around the world, " Jane Smart, director of IUCN's global species program said in a statement.

CNN: Western black rhino declared extinct