Pygmy hippos are the most internet-famous species around, thanks to viral sensation Moo Deng – but in the wild these creatures are shy, elusive and incredibly rare.

Harlequin toads lit up the jungles of South and Central America with their dazzling colours, until they began to vanish – but some of these tough little toads are bouncing back…

Red pandas might be unbearably cute, but they were the original pandas - long before their black-and-white namesakes stole the spotlight…