Fritillary, Dark Green
63 - 69mm
A large, bright orange butterfly with a wingspan of about 63mm, very slightly paler than the High Brown, with very similar but less intense dark brown markings across all upper wings and the lower forewing. The cryptic markings along the leading edge of the upper forewing look vaguely like the numerals 1338. The dark markings towards the border edge are far more triangular compared to the zigzag of the High Brown and more obviously enclose the orange into semi-circular patches. The sub-marginal spots are not so pronounced. The female is a duller shade of colour all over. But it is the undersides of the wings that are the diagnostic feature, for the shading of the green scales is pervasive and there are no red markings at all as in the High Brown. The outer edge of the under forewing has some green patches and four silver ovals. The under hindwing has considerable green shading with some silver patches but less intense and more scattered than the High Brown and with a smaller outer ring of oval patches.
The Dark Green Fritillary is seen on the wing from June to August.
It is particularly drawn to purple flowers, such as most thistle species; especially Marsh and Spear Thistle.