Ключевые слова: animal, animals, aussie, australia, australian, celebrate, celebration, commemorate, commemoration, communication, historic, historical, history, icon, iconic, kangaroo, letter, life, macropod, macropodidae, mail, marsupial, native, natural, nature, philatelic, philately, post, postage, postal, postmark, postmarked, red, roo, southern hemisphere, species, stamp, stamps, symbol, wild, wild life, wildlife,