Editing Swiftlet (section)

== Cave ecology ==
[[Guano]] from both the swiftlets and the many bats that inhabit the caves supports a huge array of specialized animals that feed on the dung. There are yet other creatures that have evolved to feed on these dung eaters as well as on the bats and the swiftlets themselves, including [[snake]]s that can climb the sheer walls to snatch a passing meal and huge carnivorous [[Cricket (insect)|crickets]] that prey on chicks and bat pups. This cave fauna [[ecosystem]] is self-sustaining, the only link with the outside being the birds and the bats that bring the nutrients into the caves in the first place.

The [[Philippines|Philippine]] [[municipality]] of [[El Nido, Palawan|El Nido]] in [[Palawan]], known for its [[limestone]] [[cliffs]] and pristine [[beaches]], is home to a thriving bird's-nest market. The name [[El Nido, Palawan|El Nido]] is the [[Spanish language|Spanish]] term for literally "The Nest". Many locals still practice manual climbing of the limestone caves to gather swiftlet nests.