Glowworms in Blue Mountains National Park, Australia

Info. Glowworm caves in Australia

In the warm season from December to March, glowworms speckle the walls and ceilings of caves here in Australia. To humans they're hypnotisingly harmless and add a little otherworldly charm to the caves in such places as Blue Mountains National Park, as seen in our photo. But if you're a fly or mosquito, beware! Glowworms dangle tiny, sticky silk strands that trap winged insects flying towards what looks like a starry night sky, but is in fact the cave ceiling, covered in glowworms, patiently waiting to reel in a deceived fly.