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.
Riversleigh rainforest koala Riversleigh rainforest koala codice_1 The Riversleigh rainforest koala (Nimiokoala greystanesi) is an extinct marsupial, closely related to the extant koala, that inhabited northwestern Queensland in the early-middle Miocene (23–16 million years ago). Along with species of sister genus "Litokoala", the Riversleigh rainforest koala is the smallest representative of family "Phascolarctide". Based on cladistic analysis, "Nimiokoala" is one of the more basal genera of "Phascolarctide". It died out due to climate change rendering the environment more arid. It probably had a more generalized diet than that of the modern species, but its exact food preferences are unknown. The generic name, "Nimiokoala,"