Why do all insects (that I can think of) start their life in a stage that crawls (usually wormlike of some kind) and usually end their lives in a form that can fly. I cant think of any insects that start being able to fly and then their final form is flightless.

Im guess its because the final stage is the stage that mates and flying is critical to mating in some way.

@freemo what reason would you lose ability to fly why. hmm. and worms reproduce quite well without any flying
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@dick Its common for animals to loose a capability as an evolutionary advantage. Basically if it isnt benefiting you much then you are wasting energy maintaining the systems for it, so if flying isnt worth the cost it could be lost.

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