The bird’s nest’s color is bloody red.This is caused by the bird nest in the red cave walls with natural minerals. The red color does not come from birds that spit out bloody as many people understand it. The red bird's nest is tough and tenacious. So it takes more time to soak and boil than other types of birds. Therefore, It would takes time to stay completely soak in water around 20-24 hours and spent 2 - 2:30 hours boiling. Since the ancient time, Chinese doctors used the red bird’s nests in order to enhance blood system. As a matter of fact, red bird nest is expensive and rare because it is only be found in natural cave on specific island.