Butterflies and stag beetles are complete metamorphosis insects with pupa stage; crickets and walkingsticks are incomplete metamorphosis insects whose juveniles are similar to adults.

• 蝴蝶、形虫是具有蛹时期的完全变态昆虫，蟋蟀、节虫是幼期跟成虫相似的不完全变态昆虫。