Photo taken near Bix, Oxon., 12/05/12
I've only seen this butterfly a few times, although it is quite common. It flies in May/April then again in July/August - the spring larvae feed on holly, the autumn larvae feed on ivy. The male (above) is paler and has a thinner black edging to the wing than the female (below).
Photo taken near Chesham, Bucks., on Walk 7 of the Chiltern Chain Walk
Photo taken 9/08/14 at Totternhoe, Beds
Photo taken 8/05/08 near Asheridge, Bucks., on Walk 6 of the Chiltern Chain Walk.
Photo taken 19/4/20 at Holywell, Beds.
Photo taken 22/04/18 at Kensworth, Beds.
Photo taken 2/06/18 at Kensworth, Beds.