Kangaroo is the symbol of Australia, appearing in the Australian emblem and some Australian currency patterns. Many Australian organizations, such as Australian Airlines, also use kangaroos as their symbol. Vehicles and ships of the Australian Army often wear a bag of mouse logo when they are on overseas missions.
Another reason why Australia has made kangaroos one of the animals on its national emblem is that they will always jump forward and never retreat. I hope people have the same spirit as kangaroos, never shrink back.