Green-veined White Caterpillar Pieris napi

The caterpillar of the Green-veined White Butterfly is a similar size and structure to that of the Small White but it is slightly bluer-green, doesn't have a yellow dorsal line (may have a faint blue-green one) and instead of a dotted yellow line on the flanks it has yellow-bordered spiracles. They turn a little darker as they get ready to pupate - as is this one. Caterpillar food plants are crucifers, especially cabbage family, and nasturtiums and wall flowers.

The chrysalis of the Green-veined White Butterfly is also a similar size and structure to that of the Small White, tied to its surface with silk. That on the left and centre is 2 days old and already the veined wing structure is visible. It will overwinter in this state. That on the right is 7 months later, in April the following year.