Good quality bird's nests should be light yellow or white in color, have a mild fishy smell and should not have a lot of small hairs. If the color and taste of the bird's nest changes, it may be caused by moisture, mildew, spoilage or the presence of impurities, all of which may affect the quality and safety of the bird's nest.

If there are a lot of small hairs in the bird's nest, it may be due to the fact that they are not completely removed during the processing. If these small hairs are not picked clean, it is best not to consume the bird's nest as they may affect the taste and the digestion and absorption of the bird's nest.

If you have doubts about the quality and safety of bird's nests, it is recommended that you do not consume them and instead choose to buy bird's nests of reliable quality.