Towards the end of winter, brushtail possums give birth. The babies are born tiny and hairless. They make their way to the pouch, attach to the teat and grow to miniature adults. A couple of days ago, the first baby for this season emerged and is now riding on mum's back. She will carry the baby for a few weeks until he is too heavy. Then he will follow behind for a few moths more, learning how to climb, find his own food and learn the hierarchy of the possum mob.