1 Dollar - Elizabeth II 4th Portrait, Chatham Island Crested Penguin

New Zealand's Chatham Island tawaki — Eudyptes pachyrhynchus chathamensis — is a subspecies so geographically isolated that its total wild population has been estimated at fewer than 1,000 individuals, making it one of the rarest penguin forms on earth. The Chatham Islands sit roughly 800 kilometres east of the South Island, and their endemic fauna remained poorly documented well into the twentieth century.

This issue belongs to New Zealand's ongoing native wildlife bullion programme, which has drawn consistent collector interest since its inception for prioritising species with genuine conservation urgency rather than emblematic familiarity.