Butterfly

The four stages lifecycle

Mating Common Buckeye Butterflies
Unlike many insects, butterflies do not experience a nymph period, but instead go through a pupal stage which lies between the larva and the adult stage (the imago). Butterflies are termed as holometabolous insects, and go through complete metamorphosis.
Egg
Larva, known as a caterpillar
Pupa (chrysalis)
Adult butterfly (imago)