Wingspan 53 - 70mm. The wings of both males and females are all white with a black mark on the corner of the front wing. This mark extends as far along the front of the wing as it does down the wing side. The female also has two black spots on the fore-wing. The undersides of the hind-wings are pale yellow and both males and females have two spots on the underside of the fore-wing.
Open country, hedgerows, gardens and allotments. The adults visit flowers for nectar and the caterpillars feed on cabbages and their wild relatives.
Status and distribution
Common and widespread throughout Britain. Common in Nottinghamshire and at Netherfield Lagoons.
Best time to see
April to November in up to three broods.