Margay...

The Margay can weigh about 2 to 9 kg (6.6–20 lbs), have a body length of 45 to 80 cm (18 to 32 in) and a tail length of 33 to 51 cm (13 to 20 in). It is very similar to the larger Ocelot, although the head is a bit shorter, the tail and legs are longer, and the spotted pattern on the tail is different. Most notably the Margay is a much more skillful climber than its relative, and it is sometimes called the tree ocelot because of this skill. Whereas the Ocelot mostly pursues prey on the ground, the Margay may spend its entire life in the trees, leaping after and chasing birds and monkeys through the treetops. Indeed, it is one of only two cat species with the ankle flexibility necessary to climb head-first down trees (the other being the Clouded Leopard). Its ankles can turn up to 180 degrees ..it can grasp branches equally well with its fore and hind paws, and it is able to jump considerable distances. The Margay has been observed to hang from branches with only one foot. The Margay is considered to be the true jungle cat, because it spends almost its entire life in trees