The Australian red kangaroo is the world's largest marsupial. Marsupials are mammals in which the female usually has a pouch.- There are more kangaroos in Australia than humans. This is mostly due to the clearing of bushlands for pasture and increased availability of surface water since European settlement.- There are 45 species of kangaroos and wallabies in Australia- The red kangaroo can grow to 2 metres (6.5 feet) tall and weigh as much as 90 kg (around 200 lb)- They can travel at speeds of up to 70 km/h (44 mph) over short distances- I've seen roos jump fences 5 feet high from a standing start with seemingly no effort! A kangaroo can jump up to 10 feet (3 meters) high with a runup and have a leap length of up to 26 feet (8 meters)- Kangaroos do "box" in the wild , but their most dangerous defence is to grab onto you with their short front paws, jump, then pump their powerful hind legs into you. Their sharp toenails can cut through clothing and skin like butter. They may also kick by using their tail as a stabilizer instead of grabbing. It's not uncommon to see male kangaroos fighting each other in these ways during mating season.I edited my profile with Thomas Myspace Editor V4.4 (www.strikefile.com/myspace)