On Mt. Tamborine above the Gold Coast in Queensland, Australia is a man made cave in a rain forest where glow worms are nurtured. They grow wild in Australia and New Zealand. This photo (not taken by us since no photo taking was allowed on our visit because the worms are super sensitive to light and air movement, even breathing at close proximity) shows the snares which are similar to spider webbing that they make which hang down to catch insects. If they get too much food to eat they turn off their bio-luminescence which attracts the insects.