The soils in the area include clays of the Allerton and Wentloog Series[22] and peat soils of the Sedgemoor and Godney Series,[22] which are drained by a network of large rhynes and smaller field ditches, which support exceptionally rich plant and invertebrate fauna communities. Exceptional populations of Coleoptera occur, amongst which are at least 12 nationally scarce species and 2 nationally rare species, including Britain’s largest water beetle the great silver water beetle (Hydrophilus piceus).[22] There are several other local nature reserves.