This week DoC’s Threatened Species Ambassador Nic Toki introduces us to the NZ glow worm, Arachnocampa luminosa, or Titiwai – the constellation of the caves! Like most glow worms, these critters aren’t actually worms, they’re a fungus gnat. New Zealand has over 300 species of fungus gnat but only one – arachnocampa luminosa – that produces light. Titiwai need damp places to construct their snares, as shown below, and are therefore usually spotted in caves or tunnels. They’re under threat by spiders and a white fungus that attacks glow worm pupae.