(1) The official swallow, which started in the Ming Dynasty, is a tribute of the imperial court and is known as "Gong Yan" and "Official Swallow". Yan Guan is the best bird's nest because it is fragrant, nutritious and rare.
Yan Guan is also A Jin's four eyes. She nests three times a year on average. The nest built for the first time has complete lamp shape and the best quality. At this stage, the bird's nest is almost composed of saliva, with only a few young hairs. The second and third official swallows are intact, but there are many feathers and impurities in the nest. Bird's nest is white, smooth, cup-shaped or half-bowl-shaped.
The common house swallow lanterns and cave swallow lanterns in the market can be classified as official swallows. Moreover, wars and wars can be basically divided into three categories: blood, Jin Siyan war and white war.
Snow war
(At present, the global market accounts for less than 10%, so it is difficult to buy it in the market. Don't believe it easily. )
This Zhan Yan is blood red or light red, and most of it is a nest built by Jin Siyan with a brown tail. Due to the high content of copper oxide in the environment where Jin Siyan lives, the food it preys on contains a lot of iron, which makes its saliva red, commonly known as "blood swallow". In addition, the nest color will turn blood red due to food or external environment. Zhan Yan has been soaked for a long time, and its taste is refreshing and solid, and it is fragrant and fire-resistant. Blood swallows are low in yield, large in demand and higher in price than other kinds of bird's nest.
Jin Zhan si Yan
At present, the global market accounts for about 20%, and Yan Gongzi's family only sells such fine products. )
Jin Siyan is usually golden or yellow. This official swallow tastes tender and fragrant. The output of Jin Siyan is less than that of white smoke, which is easy to produce only because of the special island climate. During the nesting period, Jin Siyan's saliva was oxidized by air, which was golden yellow and a little transparent. In addition, long-term sun exposure will turn the bird's nest into golden yellow.
Zhan Boyan
At present, the global market accounts for 70%, and most of them are such swallows.
Among all kinds of official swallows, Bai Yan is the most tender, rich in aroma and smooth in taste. Especially domestic swallows, because among domestic swallows, the picking time of bird's nest is the shortest (once every three months on average). The white rock lamp in the cave is relatively dense in texture, with large expansion force and average concentration-(sialic acid content).
(2) Mao Yan
Mao Yan mainly refers to Jin Siyan with gray waist, which is a cave swallow. Its origin includes Thailand, Indonesia, Sabah and Sarawak, Malaysia.
Mao Yan likes to build nests with her saliva and feathers, so this kind of bird's nest contains more feathers, and its nutrition is not as good as that of Yan Guan. The nest color is dark, there are many impurities, the processing technology is complex and the treatment is difficult. Mao Yan can be basically divided into two categories: freshwater swallows and saltwater swallows.
Tanshui
Fresh water refers to Mao Yan picked in caves, which is mostly produced in Indonesia, Thailand, Vietnam, Myanmar and other places. The nests of this hairy swallow vary in size and contain many feather impurities. The color of freshwater swallows is beige or yellow. The part where the bird's nest connects with the cave, that is, the swallow horn, is slightly yellow.
salt water
Saltwater Swallow refers to Mao Yan, also known as Haiyan, who lives in coastal areas and comes from Indonesia. Because of its red swallows, the market demand is not high. But people in the industry don't think so, because salt water swallows can be processed into handmade swallows.
(3) Grass swallows
A wild swallow, small in size, mostly distributed in the southern Philippines, also known as Philippine grass swallow. They mix the cut grass with saliva to build a nest. This kind of bird's nest is mixed with a lot of grass clippings, and the appearance is all grass clippings, which is the worst quality. So the method of distinguishing grass swallows is particularly easy. There is basically grass. Therefore, the price of grass swallow is cheaper than other bird's nests, and most of the popular instant bird's nests on the market are made of it.