1 Ivory-Billed Woodpecker

A North American bird so endangered it may actually be extinct

2 Amur Leopard

The worlds rarest cat: Only 40 left in Russias Far East

3 Javan Rhinoceros

No more than 60 of these swamp-dwelling Asian rhinos exist

4 Greater Bamboo Lemur

Heres the scarcest of Madagascars fast-dwindling lemur species

5 Northern Right Whale

Hunted to near extinction, 350 right whales still swim the Atlantic