144947 Large White Pieris brassicae Wingspan 60mm. As its name suggests, this the largest British ‘white’ butterfly. Adult upperwings are creamy-white with black tip to forewing; female has additional two spots on forewing. Underwings are yellowish. Adult flies May–September. Larva is black and yellow and feeds on cabbages and related plants; usually found in groups. Common and widespread, and often seen in the garden.