Black-Veined White Butterfly Geocoin

To flutter by caches and make people smile.
Photographs of the butterfly in woodland settings and flowers would be lovely too.
PLEASE NOTE - although a butterfly and not a moth, to save your fabrics and backpacks being nibbled, please move along within 2 WEEKS. After all, what's the point of a trackable that doesn't travel?

With a wingspan of approx. 4.5 cm this black nickel and enamelled white geocoin is shaped like the butterfly it is named for. It begins the journey in a plastic wallet accompanied by a small laminated card explaining its mission for those geocachers who don't have instant internet access in the wilds of the countryside.

Now for the ecological and biological stuff!
First listed as a British species in 1667, this large butterfly became extinct in the British Isles around 1925 with its last remaining stronghold in the south-east of England. This species was always considered a rarity in the British Isles by early entomologists, although it is often very common on the continent.

This species forms discrete colonies that fluctuate greatly in numbers, although the cause of the ultimate demise of this species in the British Isles is a mystery since its foodplants can be found in abundance in all of its former sites. Disease (fostered by poor autumn weather), relatively-mild winters and increased predation by birds have all been suggested as potential causes of this demise. There was a successful reintroduction in Fife, Scotland, although this was only able to survive with appropriate protection of the larvae from birds. This species was concentrated primarily in the southern half of England and south Wales. The strongholds were in Kent (which held 40 colonies), Hampshire, Gloucestershire and Sussex.