A fly feeds its young internallySourced
Tsetse larvae receive milk-like nourishment
A female tsetse fly develops one egg at a time inside her body. The larva hatches internally and receives nourishment from specialized milk glands before being deposited at an advanced larval stage. Its reproduction differs markedly from the familiar image of flies laying batches of eggs.
Insect reproduction has more than one pattern.
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Tsetse fly · Wikimedia contributors
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Reviewed: 2026-10-05