Bird's Nest Can Be Categorized Into Two Main Type: House Nest And Cave Nest.

The House nest refers to nests that are build in wooden-roofed swallow farmhouses that are humid and dark. The interior temperature (28°C - 30°C), brightness and relative humidity (90%) are relatively similar to the conditions found in the bird’s natural cave habitat. The swiftlet leaves the farmhouse to find food in the wild in the morning and returns in the evening. Since the farmhouse provides the birds a better habitat, house nest contain extremely less impurities and feathers. The are cleaner, have an intact boat or spoon shape, and have a high swelling capacity. The white nests are smooth, while the yellow and bloody-red nests are crunchier because the contain more minerals than white nest.

The cave nest refers to nests constructed in caves and on cliffs. Owing to the harsh natural climate and environment, the nest is firm, hard and deep in color. It is not as well shaped as the house nest and exhibits higher impurities. The cave nest is crunchy with a low swelling capacity that lengthens the time for it to swell when preparing.