The Cotesia Glomerata embryos are injected into a caterpillar by their mothers and develop for about 14 days before using a virus in their DNA to paralyse their host. After gnawing their way out using saw-like teeth, they spin cocoons. The caterpillar, still affected by the virus but no longer paralysed, builds a silky blanket over the larvae and defends them from attackers until it starves to death.
Watch a video of the cycle here: http://bit.ly/19JlrGA
Photo: Flickr user ruiamandrade, http://bit.ly/1brytvN
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