10 Pence - Elizabeth II Hen Harrier, Colourised

Guernsey's wildlife decimal series has leaned heavily on the colourisation technique since the 2010s, applying enamel-like surface treatments to standard circulating planchets as a way of generating collector premiums from otherwise modest base-metal issues. The Hen Harrier was chosen partly because of genuine conservation concern — the species had effectively vanished from Guernsey as a breeding bird by the mid-twentieth century, persisting only as an occasional winter visitor.