The glowworms are actually a genus of five fungus gnat species that glow during their larval stage. The blue-green light in their tails illuminates their sticky, poison mucus-covered silk threads, attracting unsuspecting insects that become food for the larvae. The bioluminescent phenomenon creates sparkling constellations in the “sky” of the caves… an incredibly beautiful trap:
Watch this next: David Attenborough narrates a Waitomo Glowworm cave tour.
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