bennett's tree-kangaroo ("dendrolagus bennettianus") is a large tree-kangaroo. males can weigh from 11.5 kg up to almost 14 kg (25 to 31 lbs), and female about 8 to 10.6 kg (17.6 to 23 lbs). they are very agile and are able to leap 9 metres (30 ft) down to another branch. they have been known to drop as far as 18 metres (59 ft) to the ground without injury.