The endangered Goodfellow's tree-kangaroo (Dendrolagus goodfellowi) is named after Walter Goodfellow, a British naturalist, who collected the original specimen in south-eastern New Guinea in 1908. Tree-dwelling marsupials native to the tropical rainforests of Papua New Guinea, each individual has two distinctive golden racing stripes down their back and a unique pattern of yellow tail rings. They can leap from branches up to 18 metres (59 feet) high straight down to the ground without injury. Unlike regular ground kangaroos that must hop with both legs moving together, Goodfellow’s tree kangaroos can move their hind feet independently which allows them to walk and climb vertically.
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