Austin the koala sits quietly atop his gunyah -- or shelter -- built from tree branches and bark in his enclosure at the Port Macquarie Koala Hospital.Sue Ashton, president of the privately-run clinic, says the fact Austin has climbed to the top of his gunyah is a sign he's on the mend. But the furry marsupial, one of Australia's most iconic animals, holds onto his branch tentatively with still-sore paws, and his dull, singed fur reveals patches of burnt skin underneath.Austin is one of 41 koalas the hospital -- roughly four hours northeast of Sydney -- has treated for injuries sustained in…READ FULL ARTICLE