2017 $2 Australian Koala 2oz Silver Antiqued CoinKoalas in the southern parts of Australia are considerably larger and have thicker fur than those in the north. This is thought to be an adaptation to keep them warm in the colder southern winters. The reverse of the coin depicts an adult koala sleeping in a eucalyptus tree surrounded by gumnuts, gum leaves and gum blossoms. The design also includes The Perth Mint's traditional P mintmark. The obverse of the coin portrays the Ian Rank Broadley effigy