Mosquito-sized glow worms, Arachnocampa luminosa
These glowworms are a species of fungus gnat endemic to New Zealand. Both the larval stage and the Imago are luminescent. The species is known to dwell in wet caves, grottoes and sheltered, humid places in forests. Its Māori name is titiwai, meaning "projected over water".
Larvae glow to attract prey into their threads, perhaps luring them into believing they are outdoors, for the roof of a cave covered with larva can look remarkably like a starry sky at night. A hungry larva glows brighter than one which has just eaten. Prey include midges, mayflies, caddis flies, mosquitos, moths, or even small snailsor millipedes. When prey is entangled in a snare, the larva pulls it up by ingesting the snare and starts feeding.