Birds' Nest Soup
The small Thai town of Pattani has gone to the birds - literally. The town's economy is booming after residents started collecting bird saliva.
Sea Swift nests, used to make birds' nest soup and made from hardened saliva, sell for $2,000 a kg. A few years ago, the birds inexplicably started colonising Pattani. Now, all the residents have got in on the act. As one resident states: "We used to live here. But now we're going to move to make space for the birds."
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