#psechrus clavis

Ecologists have observed a species of nocturnal spider attracting prey to its web using the bioluminescent beacons of already trapped fireflies. This rare example of a predator exploiting its prey's mating signal for its own gain is documented in the Journal of Animal Ecology. Researchers at Tunghai University, Taiwan have observed sheet web spiders, Psechrus clavis, capturing fireflies in their webs and leaving them there while they emit bioluminescent light for up to an hour. The researchers even observed the spiders going to check on the captured fireflies from time to time.