The lapidary snail Helicigona lapicidus became regionally extinct in Ireland in the 1970s. (Photo: Wiki Commons)

The lapidary snail Helicigona lapicidus became regionally extinct in Ireland in the 1970s. (Photo: Wiki Commons)

The lapidary snail Helicigona lapicidus became regionally extinct in Ireland in the 1970s. (Photo: Wiki Commons)