5 Dollars - Elizabeth II European Buffalo

Cook Islands issued a considerable volume of wildlife-themed commemoratives through the late 2000s, most produced under licensing arrangements with European minting houses rather than any domestic facility — the islands have no mint of their own. This piece falls squarely into that category, struck as part of a broader series targeting the collector bullion market that was expanding rapidly in the wake of the 2008 financial crisis, when silver spot demand pulled collector-issue sales with it.

The European bison (Bison bonasus) had been hunted to extinction in the wild by 1927, surviving only in captivity before a coordinated reintroduction program began in Poland's Białowieża Forest in 1952.