Looking after a bunch of boisterous youngsters was taking its toll on Grandpa Kangaroo. All he could think of was finding some time to himself — but that meant being alone. Kangaroos live in groups called mobs. Usually a large male kangaroo oversees a number of females and their young. While some kangaroos in the mob have their heads down grazing, others keep watch for danger. A kangaroo alone could easily fall prey to dingoes or other predators.