The golden-mantled tree kangaroo is just one of dozens of species discovered in late 2005 by a team of Indonesian, Australian, and U.S. scientists on the island of New Guinea.

The animal is the rarest arboreal, jungle-dwelling kangaroo in the world, the researchers say. This was the first time the mammal was found in Indonesia, making it only the second site in the world where the species is known to exist.

The kangaroo was discovered on an expedition in the Foja Mountains of Indonesia.

The National Geographic Society, Conservation International, and the Biology Research Center of the Indonesian Institute of Sciences supported the expedition.

• Read "'Lost World' Found in Indonesia Is Trove of New Species"
• See More Photos in the News
• See Today's Top News Stories
• Get Our Free Photo Newsletter