Close up shot of an adult male koala, phascolarctos cinereus chilling on top of the tree with dark brown scent gland in the centre of the white chest to attract female and mark tree territory

koala marsupial eucalypt eucalyptus australian australia healesville queensland arboreal zoo bear wildlife phascolarctos cinereus fluffy mate animal sleep female male branch chill conservation reserve gland species sternal sedentary tree fur currumbin habitat brown chest natural territory grey native mark park breed centre attract scent sanctuary moonlit season lone pine dark white