Common Brimstone; Limonera

Male. The male is sulphur yellow on the upper side and the female white with a greenish tinge but both have an orange spot in the centre of each wing. They never settle with their wings open and from the underside the sexes are more difficult to separate but the female is still paler. Their wing shape is unique and is designed to act as camouflage while they rest and during hibernation. G. rhamni is one of the longest lived butterflies, living up to thirteen months, although most of this time is spent in hibernation.