Ancient Chinese Royal Tomb Held Spiritual Feather Decoration Made With Glue From Extinct Buffalo
More than 2,000 years ago, someone carefully tied the brightly colored bird feathers for a royal burial in ancient China. This delicate ornament was supposed to survive the time necessary to accompany the dead into the afterlife.
Instead, enough survived underground that modern scientists could identify the birds they came from, including hoopoes and crossbills – and even trace the glue that holds the decoration together to an extinct water buffalo.
The decoration was discovered inside Tomb No. 1 at Wuwangdun archaeological site in eastern China, a royal mausoleum believed to belong to King Kaolie of Chu State, who died in 238 BCE.
The results, published in Scientific bulletinshow how elite feather decorations were made during the Warring States period in China, when feathers had symbolic and spiritual meaning. Ancient texts describe feathered banners used in ceremonies and beliefs related to immortality and transcendence, but physical feathers rarely survive because keratin breaks down easily over time.
Ancient Chinese feather decoration reveals symbolic bird species
Researchers identified feathers from five species of birds. These included the Hoopoe, Silver-breasted Crossbill, Common Crossbill, Black-headed Grosbeak and Yellow-bellied Whistler. Some of these birds probably lived locally, while others may have arrived via long-distance trade networks.
The decoration does not appear to have been assembled from random feathers. Some birds may have been chosen for their bright colors and textures, while others had symbolic meaning. The hoopoe, for example, is known for its dramatic crest and was associated in ancient China with beauty and good fortune. In a royal tomb, these meanings probably mattered as much as the appearance of the feathers.
Researchers note that the hoopoe also had symbolic importance beyond China. In ancient Persia and Egypt, birds were sometimes linked to spirituality and the movement of souls between worlds.
Learn more: China’s ancient tombs reveal links between political stability and prosperous landscapes
The glue came from an extinct buffalo
The researchers also found evidence that the feathers had been bound together using animal glue. At first, the proteins seemed to match modern swamp buffalo. But domestic swamp buffalo are believed to have only arrived in China centuries after the tomb was built.
To solve the mystery, the team compared the proteins to the remains of an extinct species known as the short-horned water buffalo. The match went much better.
Until now, the last confirmed remains of the species dated back more than 700 years earlier. If the glue actually came from the short-horned water buffalo, it suggests that the animal may have survived longer than previously thought – potentially until the end of the Warring States period itself.
The discovery could also help researchers answer larger questions about when domestic buffalo spread to China and what happened to the native species that once lived there. The team identified specific protein markers that could distinguish between different species of buffalo, which could help future archaeologists study ancient animal remains in more detail.
Reading ancient feathers through proteins
Because feathers are primarily made of keratin, they generally do not survive intact in archaeological sites. Even when fragments remain, identifying bird species based on their appearance alone can be tricky after centuries underground.
To study the decoration, the researchers used a technique known as paleoproteomics, which analyzes tiny surviving fragments of ancient proteins. After taking a microscopic sample of the ornament, the team used mass spectrometry to identify the proteins in the birds’ feathers and the glue used to bind them together.
Ancient proteins do not preserve evenly over time, meaning some original materials may already be lost. Despite this, the surviving traces were enough to reconstruct part of the decoration more than 2,000 years after its burial in the royal tomb of Chu.
Learn more: More than 700 ancient Chinese poems describe the decline of Yangtze finless porpoises
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