Science Kids Animals From Down Under - Australia's Furry And Feathered Friends V1-0002 Koalas are iconic Australian marsupials known for their adorable appearance and unique lifestyle. They spend most of their time sleeping due to their low-energy diet of eucalyptus leaves, which they carefully select for nutrients. Despite facing challenges like habitat loss and wildfires, efforts are being made to protect the endangered koala population through conservation initiatives such as planting trees and preserving their natural habitats.