Lulworth skipper their greatest since its discovery there. With a wingspan of 24 to 28 millimetres, females being larger than males, the Lulworth skipper is a small butterfly, the smallest member of the genus "Thymelicus" in Europe and among the smallest butterflies in Britain. Aside from the size difference, the sexes are distinguished by females having a distinct circle of golden marks on each forewing. Due to their likeness to the rays around the eye of a peacock's feather, these are often known as "sun-ray" markings, and they can faintly appear on males. The Lulworth skipper was first described by German entomologist
Lulworth Ranges Heritage Site. The range includes the ghost village of Tyneham, deserted in 1943 and abandoned permanently following its compulsory purchase by the Army in 1948. The ranges are used for static and mobile live-firing practice by tanks and other armoured vehicles. The ranges are cleared for use by tank main armament and other vehicle-mounted heavy weapons. Lulworth Ranges has an electrically powered rail targetry system which is visible on Google Earth and from the surrounding hills. The railway consists of a four track shed on a short branch, which is connected to a small within a large loop. For safety