After 3-4 months later, when the young grown up and left the nest. Harvesters will be picking the nests for processing. In fact, natural white bird nest has various degree of white as shown in Figure 4 - whitish-yellow, whitish-grey and milky white colors.
At Processing Centre
At our processing centre, bird nests are sorted into cup-shaped, corner-shaped, loose broken pieces and graded individually. To clean those nests are tedious, long and labour-intensive process. Below are some pictures of workers in actions.
Figure 5: Figure 6: Figure 7:
Categorise White Cup-shaped Nest Handpicked feathers of Cup-shaped Nest (A) Handpicked feathers of Cup-shaped Nest (B)