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.
Koala Brown and Bauer during their stay in New South Wales. Home, who in 1808 published his report in the journal "Philosophical Transactions of the Royal Society", gave the animal the scientific name "Didelphis coola". The first published image of the koala appeared in George Perry's (1810) natural history work "Arcana". Perry called it the "New Holland Sloth" on account of its perceived similarities to the Central and South American tree-living mammals of genus "Bradypus". His disdain for the koala, evident in his description of the animal, was typical of the prevailing early 19th-century British attitude about the primitiveness and oddity