Habits
Kangaroos are the only large animals that hop as a primary means of locomotion. Their springy hind legs and feet are much stronger and larger than their arms (or "forelimbs"). According to the San Diego Zoo, kangaroos can cover 15 feet (7 m) in a single hop and can hop as fast as 30 mph (48 kph). Usually, 20 mph (32 kph) is considered their cruising speed. When feeding, kangaroos use a slower, walking movement, and for that they use their muscular tail as a kind of fifth leg, pushing off the ground as they move along.
Kangaroos are social and live in groups called a mob, a herd or a troop. Kangaroos in a mob will groom each other and protect each other from danger. If a kangaroo suspects there is danger in the area, it will stomp its foot on the ground to alert others. If it comes to blows, a kangaroo will box and kick its opponent.