What kind of bird is Costin? Why did the Jurchen and the Liao Kingdom forge a feud for this bird?

Haidongqing is a falcon raptor with white feathers and brown spots. Adult Costin is about 1 meter tall, with two wings spread over 2 meters long. He is good at catching swans, wild ducks, rabbits, roe deer and other animals, and is a predator standing at the top of the food chain.

Most modern people may be unfamiliar with the name Costin, but hundreds of years ago, Costin’s name was known to everyone in the Northeast.

Costin is distributed in the Northeast region. The Jurchen people call it "Xionguru", which means the world's tallest and fastest bird. In addition, Costin is also the highest totem of the Jurchen family, and is the legendary "God of Ten Thousand Eagles." However, although Costin’s position in the hearts of the Jurchens is very sacred, it is a pure hunting tool in the eyes of some other ethnic groups.

From the 11th to the early 12th century, northern China was under the rule of the Liao Kingdom established by the Khitan people. Although the North was far less abundant than the Central Plains at that time, there were always a few things beyond the reach of the Central Plains. The most precious of these was a large pearl called the "Northern Pearl".

Beizhu is produced in Heilongjiang, Jilin, Liaoning and Shanhaiguan. The reason why it is so precious is that one is because of its large particles and strong pearly luster; and the other is that it is very difficult to obtain Beizhu. The picking time of Beizhu is after November of each year. Only at this time, the pearl particles contained in the clam shell are the largest and the color is fullest. However, everyone knows that after November, the northeast is already a piece of ice and snow, and it is an impossible task for the ancients to dive into the icy deep water to collect pearls. So how can we get Beizhu?

Through observation, people found that there is a kind of swan that catches mussels for food at this time of year. The pearl cannot be digested, so it stays in the swan's crop. Therefore, you don't need to dive into deep water to catch mussels if you want to pick Beizhu, you just need to catch swans. However, it is also very difficult to catch a swan, because the swan flies very high, even if the archer wants to shoot the swan in the strong north wind, it is almost impossible to do it. So people set their sights on Costin.

Hai Dongqing is a natural killer, and hunting swans is its strong point. Therefore, people tried every means to capture Costin, and then domesticated it. Then use Costin to capture the swan to obtain the Beizhu that was swallowed by the swan in the crop.

At that time, the aristocracy of Liao State was eager for Beizhu, so it became an important task to capture Costin in order to obtain Beizhu. In addition, the nobles of the Liao Kingdom loved hunting, and Costin happened to be the best helper in hunting, so the Liao Kingdom also had almost unlimited demand for Costin. However, capturing Costin was laborious and dangerous. Therefore, the rulers of the Liao Kingdom handed over this chore to the Jurchens who were attached to them, and required the Jurchen ministries to contribute enough Beizhu and Costin every year, otherwise Very serious consequences.

In addition to satisfying the demand for Beizhu and hunting, the Liao State kept asking Jurchens for Costin for another important purpose, which was to consume the strength of various Jurchen ministries. At that time, the Jurchens were not a unified whole, but were composed of many small tribes. The ruler of the Liao Kingdom assigned mission targets to each tribe, so the Jurchens of each tribe had to be busy capturing Costin to complete the targets. However, Costin is scarce and difficult to capture. Therefore, the tribes often fight to the death for the ownership of a Costin. Every year, many Jurchens die in order to capture Costin.

This kind of "two peaches kill three scholars" trick was played by the rulers of Liao Kingdom at that time. The Jurchen people were resentful, but due to the power gap, they could only dare not speak, but the seeds of hatred were generations of women. The heart of real people continued to sprout, and it was not until a Jurchen named Wanyan Aguda stepped onto the stage of history in the early twelfth century that a change that changed the course of Chinese history began.

References: "金史"