found in the ditches and rhynes. The land lies in the flood plain of the River Parrett and many of the fields are poorly drained and seasonally water-logged. The terrestrial and aquatic invertebrates recorded on the site include four nationally rare species: the Great Silver Diving Beetle (Hydrophilus piceus), the soldier fly (Odontomyia ornata) and two true flies, Lonchoptera scutellata and Stenomicra cogani. Climate Along with the rest of South West England, Westonzoyland has a temperate climate which is generally wetter and milder than the rest of the country. The annual mean temperature is approximately . Seasonal temperature variation is less extreme than most of the United Kingdom because of the adjacent sea temperatures. The summer months of July and August are the warmest with mean daily maxima of approximately . In winter mean minimum temperatures of or are common. In the summer the Azores high pressure affects the south-west of England, however convective cloud sometimes forms inland, reducing the number of hours of sunshine. Annual sunshine rates are slightly less than the regional average of 1,600 hours. In December 1998 there were 20 days without sun recorded at Yeovilton. Most of the rainfall in the south-west is caused by Atlantic depressions or by convection. Most of the rainfall in autumn and winter is caused by the Atlantic depressions, which is when they are most active. In summer, a large proportion of the rainfall is caused by sun heating the ground leading to convection and to showers and thunderstorms. Average rainfall is around . About 8–15 days of snowfall is typical. November to March have the highest mean wind speeds, and June to August have the lightest winds. The predominant wind direction is from the south-west. Economy Willow has been cut and used on the Levels since humans moved into the area. Fragments of willow basket were found near the Glastonbury Lake Village, and it was also used in the construction of several Iron Age causeways. The willow was harvested using a traditional method of coppicing, where a tree would be cut back to the main stem. New shoots of willow, called "withies", would grow out of the trunk and these would be cut periodically for use. During the 1930s over of willow were being grown commercially on the Levels. Largely due to the displacement of baskets with plastic bags and cardboard boxes, the industry has severely declined since the