The nail-tailed wallaby are named because of the horny nail on the tip of their tails. The rock wallaby is unusual in that it is nocturnal. Tree kangaroos are the only arboreal kangaroos. Their forelegs are almost as long as the hind-legs. Wallabies range a variety of terrain from deep thickets with the rednecked wallaby to rocky crevice inhabited terrain with the rock wallaby.
Wallabies are generally brighter, in color, than the large kangaroos.
Potoroos or rat kangaroos, as they are sometimes called, are small mammals that do in fact resemble jumping rats. Many of this little known string of kangaroos have prehensile tails. Though they remain primarily terrestrial. The Musk kangaroo is in a category all it's own. This rat-like wallaby lives in the rain forest of northern Queensland.