Lulworth Skipper (Thymelicus acteon)
The other thing with Lulworth Skipper seems to be that it is emerging as an adult sooner than it used to. It used to be around only for a couple of weeks in early August but now report in mid June are far from uncommon. Their time on the wing has extended and they can be still seen in August.
The main feature of this little member of the skipper family is the 'rays of golden sunshine' on the wings. It is about the same size as its two close relatives, the Small Skipper and the Essex Skipper and so those golden rays are importnat as diagnostic features.
Whilst the adult insect loves to feed on Knapweed (as in this photo) it can also be frequently seen on other members of the thistle family as well as Restharrow and Wild Marjoram. The larvae feed on many species of grass which is why rough downland suits it as its preferred environment.