2015 5c Silver Proof CoinAustralias unique native animals found a new home when Stuart Devlins wildlife designs were chosen to adorn the nations decimal currency in 1966. The Echidna, a rare and distinctive creature, adorns the 5c piece. Echidnas are monotremes and are only found in Australia and Papa New Guinea. Only two species of monotreme the Echidna and the Platypus exist today. They are a fitting inclusion in the artistic array of coin designs that inhabit the wallets