What is the rarest animal on earth?

Stunning Pictures: Ten of the Rarest Animals on Earth. Western Lowland Gorilla. Mountain Pygmy Possum. Philippine Crocodile. Sumatran Orangutan. Northern Bald Ibis. Black-Eyed Tree Frog. Lord Howe Island Stick Insect. White Antelope. Sartore photographed this addax, or white antelope, at the Gladys Porter Zoo. read more

While not all of the animals on this list are necessarily considered “endangered”, they would still be very challenging to photograph in the wild. In fact, some of these animals were even thought to be extinct until an unsuspecting photographer managed to snap a photograph. With that said, these are the 25 rarest animals on Earth. read more

There are only about 23 Hainan gibbons left, making it the world's rarest primate, who live on Hainan Island in the South China Sea. read more

More popularly known as the Javan rhino after the island where it is found, the Sunda rhinoceros is considered to be one of the rarest animal species in the world. Fewer than 100 examples are thought to exist in the world. read more