Weevils have snouts known as rostrums. The knobbled weevil (Hadramphus stilbocarpae) feeds on the fleshy herb stilbocarpa. It grows to 2.5 centimetres long and is found on islands around Fiordland and Foveaux Strait. Like other flightless beetles, it is attacked by rats and now survives only on predator-free islands.
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