, Thymelicus acteon
, is a
family. Its name is derived from
in the county of
, where the first specimens in
were collected in 1832 by English naturalist
James Charles Dale
The species occurs locally across
Asia Minor and
North Africa, where its population is considered stable. Its numbers have declined in
Northern Europe, leading to its European status of 'vulnerable'. Its range in Britain is restricted to the south coast of Dorset, however it is locally abundant and its numbers currently are perhaps at their greatest since its discovery there.
With a wingspan of 24–28 millimetres (0.9–1.1 in), females being larger than males, the Lulworth Skipper is a small butterfly, the smallest member of the
Thymelicus genus 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.