DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY
Ichneumon wasp. High-speed photograph of an ichneumon wasp (family Ichneumonidae) in flight. Ichneumon wasps parasitise lepidopteran caterpillars and sometimes the larvae of other insects. The wasp lays its eggs inside the caterpillar inserting them with her long ovipositor (not seen here). The developing larvae eat the still-living caterpillar from within; once the larvae are fully grown, they leave the body of the host and begin to spin their cocoons on the surface of the dying caterpillar.
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