10 Pence - Elizabeth II Swallowtail, Colourised

Guernsey's decision to issue colourised circulating-denomination pieces reflects a broader Channel Islands strategy of keeping low-face-value coins commercially relevant through collector appeal — these are legal tender issues that will never see a till. The swallowtail chosen here is Papilio machaon britannicus, the British race found in the Norfolk Broads, effectively extinct as a breeding population everywhere else in England.