Koala dominant. Older males usually have accumulated scratches, scars, and cuts on the exposed parts of their noses and on their eyelids. The koala's gestation period lasts 33–35 days, and a female gives birth to a single joey (although twins occur on occasion). As with all marsupials, the young are born while at the embryonic stage, weighing only . However, they have relatively well-developed lips, forelimbs, and shoulders, as well as functioning respiratory, digestive, and urinary systems. The joey crawls into its mother's pouch to continue the rest of its development. Unlike most other marsupials, the koala does not clean her
Adventures of the Little Koala block in 1988, as "Noozles". The Japanese animation studio Topcraft, best known for providing animation duties on many of Rankin-Bass' American animated TV specials as well as the feature film "The Last Unicorn", worked on "The Adventures of the Little Koala." Topcraft provided animation assistance for Hayao Miyazaki's 1984 feature film "Nausicaä of the Valley of the Wind"; in fact, some of the animators who worked on "Little Koala" also worked on "Nausicaa". After "Nausicaa", a number of Topcraft animators went on to work for Miyazaki's Studio Ghibli. Some notable animators who worked on this series included Katsuhisa Yamada and