Species account from Moths of Glamorgan
(Gilmore, Slade & Stewart, 2009):

Although there are scattered records from the east of the county, including Peterston-super-Ely, Llantrisant, Sully, Penarth and Merthyr, the species has always had its stronghold on Gower Commons. The favoured modern-day localities include Welshmoor and Pengwern, where adults and larvae have been found in areas where the sward is more tightly grazed and where Devil’s-bit Scabious is abundant. The main flight period in Glamorgan is during the second two weeks of May and the first week of June, when adults have been seen nectaring on a wide variety of flowers including lousewort, Ragged Robin, Bluebell, Tormentil and bird’s-foot trefoil.