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The naturalist on the battle of filming the birds of Borneo, whose nests made of saliva are prized by Chinese chefs. From 2009.

Filming birds that make their nests from saliva proved a challenge in the total darkness of a Borneo cave....

.....until a conical mound of bat guano provided a natural platform.

Series of talks by Sir David Attenborough on the natural histories of creatures and plants from around the world.

Producer: Julian Hector

First broadcast on BBC Radio 4 in September 2009.

10 minutes

On radio

Sun 21 Jun 202606:45
BBC Radio 4 Extra

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