Bird's nest is a nest made of the saliva secreted by some of the swiftlets of the Rainier Bird family and several species of swiftlets of the swiftlet genus, mixed with other substances. "Cave Bird's Nest is divided into two types: House Bird's Nest and Cave Bird's Nest. Cave Bird's Nest has different colors due to the influence of minerals, and there are White Bird's Nest, Yellow Bird's Nest and Red Bird's Nest, while House Bird's Nest has only one color: Ivory Bird's Nest.
Bird's nest is one of the most valuable traditional foods consumed in China since the Ming Dynasty. The so-called "blood bird's nests" on the market are made from artificially farmed swiftlets through the "dung fumigation method".
Expanded Information:
Classification of Origin
Cave Bird's Nest is a type of bird's nest that is harvested from caves in the wild, It is the most primitive form of bird's nests. Cave Birdnests are gray or yellow in color, with more feathers and impurities, and have a more refreshing taste. Due to the early indiscriminate exploitation, the environment for swiftlet survival has been damaged, and the production of cave swiftlets has been declining year by year, resulting in a very low output of cave swiftlets.
With the rise of environmental protection, people actively changed the environment for swiftlet survival and bird's nest harvesting. Subsequently, Cave Swallows were gradually replaced by Roofed Swallows. The House Swift only changed the environment from caves and cliffs to man-made houses suitable for swiftlet nesting, but did not change the swiftlet's living habits.
The combination of nature's pristine forest environment and the artificial house technology has effectively solved the conflict between swiftlet protection and bird's nest production, resulting in the formation of the unique original ecological House Swiftlet, which is whiter in color and has fewer hairs with a smoother and softer texture.
Reference: