Ichneumon wasp
From Tardis Wiki, the free Doctor Who reference
The Ichneumon wasp was a type of wasp found on Earth. Their reproductive cycle involved laying their eggs in living caterpillars, which provided a food source for their grubs when they hatched. (AUDIO: Wirrn Dawn)
In an alternate timeline, a parasitic Ichneumon wasp stung a battle-damaged Dalek in the year 2158, setting in motion the Mutant Phase - a chain of events that transformed the Daleks into Insectoid monsters. (AUDIO: The Mutant Phase)
