5 Dollars - Elizabeth II Rarotongan Fruit Doves

Cook Islands gained the right to issue its own coinage in 1972 under the Cook Islands Amendment Act, though it remains in free association with New Zealand. The 1979 dove series was part of a broader wave of Pacific island commemorative programs that emerged after self-governance, many explicitly designed for the collector market rather than circulation — the .500 fineness itself is a telling choice, keeping silver content low enough to reduce production cost while maintaining the category of "silver coin."

The Rarotonga Fruit Dove is endemic to the island's interior forest and was listed as a species of conservation concern well before such designations were fashionable on coinage.