Edible bird's nest collection

"The Recent History Of The Complex Is Closely Related To Harvesting And Trading Guano And Edible Bird’S Nests Found Within The Caves, Two Extremely Lucrative Commodities. This Practice Has Been Sustained To The Present Day As A Main Local Economic Contributor" (Ab Ev)

"Due To The Value Of Their Nests, There Is Great Pressure On The Populations Of Black-Nest Swiftlets (Collocalia Maximus) And White-Nest Swiftlets (Collocalia Fuciphagus) In The Malaysian Provinces Of Sarawak And Sabah. The Problems Are Particularly Acute At Gunung Mulu National Park, In Spite Of A Complete Ban On Collection There" (See Link)
See Link.Springer.Com

"Phong Nha-Ke Bang National Park In Vietnam Is Renowned For Its Numerous Caves, Including Hang En (Swallows' Cave) And The Nearby Son Doong Cave (The World's Largest). Swallow Nests, And The Practice Of Collecting Them For Food, Are Part Of The Cultural Heritage Of The Arem People Who Live In The Area."
See Www.Phongnhadiscovery.Com

"Resource Management: To Ensure Biodiversity Richness While Allowing Sustainable Harvest Of Certain Traditional Resources Within The Park By Means Of Zonation And Co-Management, And To Prevent Or Control The Exploitation Of Non Renewable Resources. Activities:.............. (3) Managing Harvest Of Swiftlet Nests," (Nom File) E.G Bukit Barisan Np ..."There Is Widespread Local Trade In Edible Swiftlet Nests From The Area. The Ministry Of Forestry Has Issued Collecting Permits For Sustainable Exploitation At Two Sites, But Most Caves In The Region Are Not Owned And Nests Are Freely Collected And Sold"

While Officially Not Allowed Inside The Park, It Still Happens (For Example Around St. Paul's Range). The Menus In Puerto Princesa City And Sabang, Where The Soup Is Frequently On Offer, Add Further Circumstantial Evidence.