The gathering of these nests is a formidable task of the intrepid souls who scale cliffs and mountains. Contrary to popular belief, the bird’s nests are not found in the faces of cliffs but in caves. Hence the gathering involves work in the nooks and crannies of caves which are dark and slippery. This makes it a rare and highly prized delicacy which is most precious to a Chinese food gourmet and which has become popular among Filipinos…. However, due to its ability to swell in boiling water, very small amounts are needed to make soup.