Formica cunicularia is a species of ant found in Britain.
This species, thought to be endemic to Britain, is found locally in southern England. This species is dark red in colouration, with slightly lighter legs. This species, unlike other Formica species, forms hillocks over it's nests. There is a range of ways it builds it's nests, for example, in the New Forest, it builds earthmounds, in Seaton (Devon) it lives under stones and in the Isle of Wight, it is found on the sides of cliffs, and in earthmounds underneath cliffs.