The world’s only scaly mammal, the pangolin rolls into a ball as a defence against predators. Sadly, this unique armour is in high demand, meaning the pangolin is now the most illegally traded wild mammal on the planet.

The world’s only nocturnal parrot, this large flightless bird has muscular legs for climbing trees and hiking long distances. But these are no defence against introduced cats and rats. Despite living up to 90 years, there’s now only around 211 birds left in existence.

The largest nocturnal primate in the world, the aye-aye’s powerful jaws can chew through tree bark, aluminium and even concrete. But it's under threat in Madagascar, where it's thought to be an evil omen.

This tiny marsupial’s closest relative is the extinct Tasmanian Tiger. Now, the numbat is slowly disappearing too: the introduction of new predators has wiped it out in 99% of its habitat.

Unlike most frog species, this amphibian spends most of its life buried deep underground, emerging for only a few days each year. But its subterranean existence hasn’t protected it from the deforestation of its habitat.

The world’s only scaly mammal, the pangolin rolls into a ball as a defence against predators. Sadly, this unique armour is in high demand, meaning the pangolin is now the most illegally traded wild mammal on the planet.