ID pointers: This species has a differing spring and summer form (seasonally dimorphic). The summer form shows a sharply defined yellowish costal blotch and in appearance resembles other Caloptilia species. In the spring form (over-wintered) however this feature is feint or absent except for a dark basal area that contrasts with the rest of the moths forewing and gives it an almost cloak-like appearance. The ground colours range from reddish-brow to greyish-brown tones. Given this is the spring form, and on the basis of the food plant being close by and the lack of any confusion species at this time of year, the moth is accepted on the superb photograph attached.