金丝燕

jīn sī yàn

珍しい

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定義

1. Aerodramus, genus of birds that use echolocation, a subset of the Collocaliini tribe (swiflets), two of whose species – Aerodramus fuciphagus and Aerodramus maximus – build nests harvested to make bird's nest soup

(bird species of China) Germain's swiftlet (Aerodramus germani)

(bird species of China) Himalayan swiftlet (Aerodramus brevirostris)

silk

chemical element Au