This short 3 minute mini doc from the BBC showing the birds responsible for make the nests in Birds Nest Soup! They are made of birds spit.
Sources:
Planet Wild Cave SwiftletsPlanet Wild Cave Swiftlets
This short 3 minute mini doc from the BBC showing the birds responsible for make the nests in Birds Nest Soup! They are made of birds spit.
Sources:
Planet Wild Cave Swiftlets
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