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These photos show several glow worms. Each worm is about 10cm long and sits horizontally across the rock, suspended by silk sacs that it produces. Each worm lowers several silk threads that trap flying oraganisms that are brought into the caves by the river.
It occurs throughout the country in limestone caves, unused mining tunnels, along stream banks, in damp bush-clad ravines, in damp shady crevices, and under tree-fern fronds in rain forests. The Glow-worm Grotto in Waitomo Cave has become world famous because of the tens of thousands of glow-worm larvae which live on the walls, ceilings, and stalactites of the grotto.