Australia is known for its adorable kangaroos, which are mainly found in Australia and New Guinea. There are four kangaroo species, including the red kangaroo, eastern grey, western grey, and antilopine. These mammals can hop quickly on two legs or stroll on all fours, but they can’t walk backward. A kangaroo’s robust legs are used for defense as well as mobility. They can jump up to 3x their height, most eat grass, and a group of kangaroos is referred to as a “mob,” “troop,” or “court.” The red kangaroo is the biggest marsupial in the world. Some males have been known to reach over 2 meters tall, and in the wild, their life expectancy is only six years old.