What is cause of the kangaroo's long jump?

Answer 1

Kangaroos jump very high because they have large, strong tendons in their hind legs which act as "springs". The springing motion requires less energy than running does, so kangaroos are able to bound higher and for longer distances than other mammals with the standard four legs can run. They have strong back legs and elongated hind feet for bounding.

Answer 2

Kangaroos are built for jumping, rather than walking or running like other four-legged animals. Kangaroos have large, strong tendons in their hind legs which act as "springs". The springing motion requires less energy than running does, so kangaroos are able to bound for longer distances than other mammals with the standard four legs can run. They have strong back legs and elongated hind feet for bounding.