What animal is foaming at the mouth?

Jin Siyan, because Jin Siyan's saliva has become a bird's nest, it should be Jin Siyan. Jin Siyan's nest is built in a man-made house, which we call "domestic swallow". Because of its special value, people tried their best to lure Jin Siyan into the house to nest. Generally, Jin Siyan's crying will be played on the stereo and he will be led into the room, and the room will be kept dark, with the temperature around 28℃ and the humidity controlled above 90%, so as to create an environment that Jin Siyan likes to live in.

Jin Siyan's nest is built in a man-made house, which we call "domestic swallow". Because of its special value, people tried their best to lure Jin Siyan into the house to nest. Generally, Jin Siyan's crying will be played on the stereo and he will be led into the room, and the room will be kept dark, with the temperature around 28℃ and the humidity controlled above 90%, so as to create an environment that Jin Siyan likes to live in.

Jin Siyan, birds, swift, swift (Apodidae) and Jin Siyan (Aerodramus) are the general names of all kinds. Body length is about 13 cm. The upper body feathers are black or brown, sometimes with blue luster. The lower body is gray and white. The wing tip is very long. The feet are short and reddish, and all four toes are forward. Live in groups and eat insects. During the breeding period, the bird's nest, which is a famous tonic, is made of glue mixed with feathers, soil and saliva and placed on a cliff in the sea rock. Edible and medicinal. There are many species of the same genus, and only a few birds are edible when they build nests. Distributed in India and Malay Archipelago. China is distributed in Hainan, Tibet, Yunnan, Sichuan, Hubei, Guizhou and other provinces.