In China, bird saliva is a delicacy

China has its own version of caviar. Bird’s Nest Soup is often called ‘The Caviar of the East’, as it is both extremely rare and extremely valuable. In China, the bird called the Swiftlet makes its nest out of twigs and saliva. These nests can cost anywhere between $2,500 and $10,000 per kilogram, which results in single bowls of soup costing an average of $100. This delicacy is very popular in the heart of Shanghai, where it is often sold on the main streets.