In the wet season floods drive wallabies off the coastal plains and back to the base of the escarpment where grasses are sparse. Despite the fluctuations of the food supplies, the wallabies breed all year. The young leave the pouch at seven or eight months and are weaned about ten months. Females mature at one year. Males weigh up to 27kg and are about 1.2 metres high when sitting on their haunches.
Females are smaller.
Both sexes are a light sandy fawn, paler on the chest and belly, with a distinct pale hip stripe and a pale cheek stripe beneath a darker eye line. Males develop longer more heavily muscled areas and broader shoulders. Agile wallabies are commonly preyed upon by dingoes. They form groups of ten to several hundred and, where they are considered too numerous in pasture or sugar cane areas, they may be shot as pests. When most inland inhabitants are doing all they can to escape the blazing heat, there is one creature that is busily moving tons of sand.