1, butterfly eggs are fertilized in vivo, and fertilized eggs develop into complete larvae under suitable conditions, which is called embryonic development period; Larvae gradually grow up after ingesting food such as leaves and flowers of plants, and reach a static insect state-pupa. Pupae continue to develop into adults and beautiful "butterflies".
2. At this time, the reproductive organs have matured and have an important moving organ-wings. Finally, male and female adults mate to produce the next generation of eggs, completing a life cycle. The first three insect states, such as eggs, larvae and pupae, are called larval stage, and the whole process from larval hatching to pupal emergence is called the post-embryonic development of butterflies, which is the continuation of embryonic development.
Extended data:
Butterfly is a completely metamorphosed insect, and its individual development is accompanied by metamorphosis, during which it has to go through four completely different insect States: egg, larva, pupa and adult. This completely different form and function is called metamorphosis. In each stage of butterfly development, it has its special external morphology and internal structure to realize its special physiological functions. From in vitro fertilized eggs to sexually mature adults, four insect stages are completed, which is a life cycle. The total time of a life cycle is the life history of butterflies.
References:
Baidu Encyclopedia-Butterfly