This butterfly is unmistakable, with its green underwings. However, it can be inconspicuous when at rest and in flight, so it is easily overlooked. For a full description, please click on the link to Butterfly Conservation's main website at the bottom of this page.
Wingspan 27 -34mm.
Adults usually appear in May, although in some years, for example 2007, they may be seen in late April. Overwinters as pupa.
May to mid-June.
Distributed throughout most of mainland area and Inner Hebrides. Look out for this species in the vicinity of larval foodplants, which include billberry, gorse and broom.