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

Cougar also called PUMA.

The Cougar (also called puma ) also known as puma, mountain lion, mountain cat, catamount, depending on the region, is a mammal of the family Felidae, native to the Americas. This large, solitary cat has the greatest range of any large wild terrestrial mammal in the Western Hemisphere, extending from Yukon in Canada to the southern Andes of South America. An adaptable, generalist species, the cougar is found in every major American habitat type. It is the second heaviest cat in the American continents after the jaguar, and the fourth heaviest in the world, after the tiger, lion, and jaguar. Although large, the cougar is most closely related to smaller felines.
While it is a large predator, it is not always the dominant species in its range, as when it competes for prey with other predators such as the jaguar, grey wolf, American Black Bear, and the grizzly bear. It is a reclusive cat and usually avoids people. Attacks on humans remain rare, despite a recent increase in frequency.