The birds called Swiftlet (Aerodramus Fuciphagus) are contained within the four genera of Aerodramus, Hydrochous, Schoutedenapus and the remaining species left in Collocalia. In Indonesia the Swiftlet (Aerodramus Fuciphagus) is known as "Walet". It also known as Collocalia. The swiftlet (Aerodramus Fuciphagus) can only be found in the tropical coastal areas. The have a narrow wings for fast flight, with a wide gape and small reduced beak surrounded by bristles for catching insects in flight.  One fact that these birds (only a few species within the genus) are possibly more renowned for, is the use of their nests for making Birds nest soup. During the breeding season, all the species salivary glands expand to produce the special sticky saliva for binding twigs and other detritus together for building the nest, which is a shallow cup stuck to the cave wall.

    Bird's nest is a Chinese delicacy that has been claimed to be an effective health giving tonic. The 'nest' in itself is made by Aerodramus (bird) form a nourishment rich gel secretion which modern research has revealed to contain a number of health promoting qualities. Bird's nest is pleasant on the palate, contains plenty of nourishment and possesses what the Chinese call "rejuvenating effects". Modern science has help ascertain the age old belief that bird's nest contains a host of different proteins (so essential to life), vitamins and various other minerals.
    Research has also found that bird's nest contains the epidermal growth factor. This helps explain why Chinese herbalists often prescribe bird's nest to people who fail to thrive or grow for no apparent reason.
    Independent laboratory investigation has also revealed that bird's nest contains a water soluble glyco-protein that promotes cell division within the immune system. These findings lend support to the belief that bird's nest promotes growth and tissue repair. Not only that, bird's nest strengthens the body's self regulating actions and provides resistance to disease.

    Chinese believe that this layer of saliva is rich in protein and vitamins. Ladies consider bird's nest one of the best beauty aids. They believe the protein and vitamins in the nest rejuvenate the complexion, smoothes the skin and keeps them looking young.
    The Bird Nest also good for lungs, digestion and helps to prevent overall dryness while boosting the immune system.