Edible Nest

It's amazing to know that bird nests can be edible.The nest built by a small bird (Aerodramus fuciphagus) of  the swift family  found in South-east Asia  is made of solidified saliva and is edible.It breeds in colonies in caves, in a cleft or in a cliff or sometimes  on a building.These Swiflets often nest in pitch dark caves.They are able to do this by using echolocation, similar to bats.The bracket-shaped nest is white and translucent and is made entirely  of layers of hardened saliva attached to the rock. It measures about 6 cm across with a depth of 1.5 cm and a weight of about 14 grams.