Cave glowworms hang sticky silk threads to snare flying insects
In damp caves from New Zealand to Australia, fungus-gnat larvae — glowworms — drip dozens of sticky fishing lines from ceilings and light a blue lure to attract prey.
An insect that brushes a strand is reeled up and eaten. Colonies turn dark chambers into starry skies of living lamps above a deadly silk forest.
Caves are hunting grounds as well as hollows. Glowworms prove darkness can host predators that fish with light and glue.
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