More familiar perhaps are the Kangaroos of Australia which jump on two legs as do Jerboas, Jumping mice and a variety of other smaller Australian marsupials. The Jerboa is the most fully bipedal of all these as it walks on two legs even when unhurried, whereas the others tend to walk on four legs but go up on two when jumping in order to move more quickly. Brachiation is the more common means of locomotion of Gibbons and a variety of other primates. Brachiation means moving by swing from branch to branch with your arms. Climbing trees can be achieved using gaits similar to both the Dog walk and the Giraffe walk, while Squirrels actually gallop up trees.
Squirrels are also unique in being able to walk down trees as well.
The ankles on their hind legs are so flexible that they can turn through 180 degrees allowing them to be equally useful going up and coming down. Swimming - Many land mammals can swim, even and including the big cats. Even some bats can survive falling in the water. Hamsters fill their cheek pouches with air before taking the plunge. Some species are semi-aquatic and are equally at home in the water as on land, i.e. Otters, Hippopotamuses.