The tsetse fly is about to give birth to a larva almost as heavy as itself. Most insects lay eggs, so why does it produce a live larva? Normally, insects like mosquitoes develop from egg to larva, then pupa, and finally adult, and their larvae must find their own food. But tsetse fly larvae grow entirely inside the mother. They complete all stages up to the third instar in the uterus, relying on nutrients the mother provides. The mother even has a special milk gland that produces fat- and protei
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The tsetse fly is about to give birth to a larva almost as heavy as itself…
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