Found in the Russian Far East and northeastern China, this leopard is one of the rarest big cats in the world, with only around 84 individuals left in the wild.
A small porpoise found in the Gulf of California, Mexico. It's critically endangered, with possibly fewer than 10 individuals remaining due to bycatch in fishing nets.
Native to Indonesia, particularly in Ujung Kulon National Park, this is one of the rarest large mammals, with only about 60 individuals surviving.
Also known as the Asian unicorn, this elusive mammal is found in the Annamite Mountains of Vietnam and Laos. It's rarely seen and one of the most threatened large mammals.
Endemic to the island of Sumatra in Indonesia, this great ape species is critically endangered due to habitat loss from palm oil plantations and illegal logging.
Found exclusively in the lake complex of Xochimilco near Mexico City, this amphibian is famous for its regenerative abilities and neotenic features (retaining larval traits into adulthood).
Native to a small area in Queensland, Australia, this wombat species is one of the world's rarest mammals, with only around 300 individuals remaining.
Found in the eastern Atlantic and Mediterranean, this shark species is critically endangered due to overfishing and habitat degradation.