Image for Cave glow worms

Cave glow worms

Duration: 02:00

Developed by Japanese TV company NHK, the image intensifier (II) system has a camera chip 300 times more powerful than the standard digibeta camera used for most wildlife filming. It took only LED headtorches to light the cave sufficiently to see the 'gloworms'. Previously, they'd been filmed using time-lapse which creates a flashing effect that doesn't actually occur.

Available since: Wed 27 May 2009


Key talent
David Attenborough

This clip is from

Planet Earth Caves

4/11 Featuring, among others, the Cave of Swallows in Mexico and Deer Cave in Borneo.

First broadcast: 23 May 2006

Image for Caves Not currently available on BBC iPlayer

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