Not the cultivated one,
in Indonesia and Thailand, people build special giant house
for those swallows, it is getting very expensive, $1,500 a pound wholesale price
Bird's nest is more a "belief" remedy,
it is true that it is high in protein, but you can get protein elsewhere.
The University of Boston Medical School has done a 5 years study on
Chinese medicine, and the result is that the contain very little nutrient
other than protein. A standard dose of bird nest would be equivalent to
the protein from 3 regular eggs without the cholesterol.
Yes, the rich C9 would claim that eating it would keep them young
Back in 80's, live abalone was so cheap($4.00 per pound) in Vancouver,
the Chinese cleared the market, lead to the almost extinct of the species
and it became illegal to catch abalone in BC. 30 years elapsed and the
damage has not recover. It was caused by Asian, mostly Chinese.
In fact, I think Chinese is the only race obsessed with abalone, Japanese
use few abalone for sashima. The rest of the world? most people never
try in their lifetime.