In Kangaroos' Lucky Escape, a rock-wallaby helps a mob of kangaroos e scape the danger of a bushfire. Kangaroos and wallabies are all macropod s (big-footed animals). They move by hopping, using their tails for bala nce. Kangaroos live on grassy plains. Their agile cousin, the roc k-wallaby, easily hops up and down the uneven slopes of its home in rock y, hilly country. About the Author: Rebecca Johnson is an award-winning primary school science teacher and has writt en more than 60 books for children.