Koala around and its head has doubled in size. The eyes begin to open and fine fur grows on the forehead, nape, shoulders, and arms. At 26 weeks, the fully furred animal resembles an adult, and begins to poke its head out of the pouch. As the young koala approaches six months, the mother begins to prepare it for its eucalyptus diet by predigesting the leaves, producing a faecal pap that the joey eats from her cloacum. The pap is quite different in composition from regular faeces, resembling instead the contents of the caecum, which has a high concentration of bacteria.
Giant koala Giant koala The giant koala ("Phascolarctos stirtoni") is an extinct arboreal marsupial which existed in Australia during the Pleistocene epoch. "Phascolarctos stirtoni" was about one third larger than the contemporary koala, "P. cinereus", and has had an estimated weight of , which is the same weight as a large contemporary male koala. Although considered a part of the Australian megafauna, its body mass excludes it from most formal definitions of megafauna. It is better described as a more robust koala, rather than a "giant"; in contrast, a number of Australian megafauna, such as "Diprotodon" and "Procoptodon goliah", were unambiguously "giants".The