Conservationists have warned of a global mass extinction for the first time since the dinosaurs disappeared.

Global wildlife populations are set to fall by more than two thirds on 1970 levels by the end of the decade.

Species affected include the African elephant, killer whale and Leatherback sea turtle.

Poaching and pollution are the main factors which threaten survival.

But the maned wolf, along with other species such as the giant anteater, are being driven out of their natural habitat in Brazil being converted into farmland.

Disease is leading to the decline of the European eel as well as over-fishing and changes to rivers which impedes its migration to the sea to breed.

Amphibians around the world are being hit by a species of fungus that causes the disease chytridiomycosis - thought to have caused steep declines or extinction of more than 200 species.

And Major Mitchell's cockatoos saw a population crash in Australia.

This was mainly because people were illegally taking eggs for the pet trade, although this is slowly beginning to recover.