Small White Pieris rapae

1st brood male. (Males have only one spot, or no spot, on upper surface of forewing).
1st brood male. (Males have only one spot, or no spot, on upper surface of forewing).
2nd brood female. (Females have two spots on upper surface of forewing)
2nd brood female. (Females have two spots on upper surface of forewing)
2nd brood underside.
2nd brood underside.
A female rejecting the advances of a male.
A female rejecting the advances of a male.
Eggs are laid singly on underside of foodplant.
Eggs are laid singly on underside of foodplant.
Larva has pairs of yellow spots on sides and pale yellow stripe along back.
Larva has pairs of yellow spots on sides and pale yellow stripe along back.
Pupa, normally attached by silken girdle, accidently snapped in this case.
Pupa, normally attached by silken girdle, accidently snapped in this case.
A close-up of the larval yellow side spot pairs and the yellow dorsal stripe
A close-up of the larval yellow side spot pairs and the yellow dorsal stripe
 
Information

Red List status: Least Concern
NERC Act S41: Not listed
Local status: Common.
Distributed over whole county.
Size: Medium.
Larval foodplant: Crucifers, especially cabbages and nasturtiums, which makes it unpopular with some gardeners, though as larvae are present in smaller numbers than Large White, so not as destructive.
No. of broods: Two. The markings on the second brood are darker than the first.
Flight time(s): First brood flies late March to late June.
Second brood flies mid July to mid October.
The second brood is usually more numerous and slightly darker in colour.
Numbers are boosted by migrants from the continent.
Average first date: 26th March
Average last date: 18th October
Winter: Pupa
Habits: Easily confused with Green-veined White in flight, but undersides are clearly different when settled. (See Green-veined White).
Habitats: May occur anywhere.
Distribution: