If you glance up while paddling through the Waitomo Caves in New Zealand, you’ll see what looks like a night sky full of stars. But that light is actually produced by bioluminescent glowworms—the hungry larvae of small flies living near the cavern roof. Their steady light lures prey into the long, sticky traps the larvae have hung from the cave ceiling. When it feels a tug, the larvae reels in and eats its catch. But this species doesn’t like to share its space: a glowworm will attack and eat another larva that tries to drop a bioluminescent line too close by.
Photo: 2il org