Swallow nest is a popular trading name for swiftlet's edible nest, a tiny bird found throughout South East Asia. The bird is from Apodidae family of Collocalia genus (Scientific name is now changed into Aerodramus). Collocalia is one among the unique and precious tropical birds, lovely tiny bird with strong flying endurance. This kind is having flying insects for food, some are able to fly daytime for more than ten hours to search for food and use their sense of echolocation to determine its nesting, resting place in dark cavity. Their nest is constructed using their rich gel secretion, produced by a pair of salivary glands under their tongue, which harden when exposed to air. The most valued nest by the market came from these four species; Collocalia Fuchipaga (edible nest or white nest), Collocalia Maxima (feather nest or black nest), Collocalia Esculanta (grass nest) and Collocalia Vanikorensis (grass cave nest).