5 Dollars - Elizabeth II Northern Black Racer

The Northern Black Racer (Coluber constrictor constrictor) is a subspecies native to the northeastern United States and southeastern Canada — geographically and ecologically remote from Cook Islands, which has no snake fauna of its own. Cook Islands has issued wildlife coins featuring species from across the globe since the 1990s, essentially functioning as a mint-for-hire under New Zealand monetary oversight, with face values that bear no relation to actual circulation.

The .999 fine, one-troy-ounce format places this squarely in the international bullion-collector market rather than any domestic monetary function.