The Discovery
In August 2024, researchers in Zhenghe County, Fujian province, uncovered a significant fossil belonging to the Late Jurassic Zhenghe Fauna in southeastern China. Named Yuezhuornis yangyuanensis, this creature lived roughly 150 million years ago. The discovery, led by scientists from the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences and the Fujian Institute of Geological Sciences, was described in the journal Nature on October 14, 2026.
What Scientists Found
The crow-sized fossil represents an animal that weighed around 821 grams (1.8 pounds). Although its front limbs formed wings, they were roughly one-third shorter than its hind legs. When researchers compared these limb proportions to 377 living bird species, they found the closest match to modern ground-dwelling birds, such as pheasants.
The preserved skeleton displays a striking blend of avian and dinosaurian traits, including:
- A bird-like pelvis characteristic of early avialans.
- Jaws lined with closely packed, serrated teeth rather than a toothless beak.
- A long, bony tail.
- A highly flexible second toe equipped with a sickle-shaped claw, similar to predatory deinonychosaurs like Deinonychus and Velociraptor.
Why It Matters
The discovery shows that flightlessness emerged very early in the evolutionary history of birds. While the contemporary German bird Archaeopteryx possessed wings suitable for flight, Yuezhuornis was adapted primarily to terrestrial life, running along the ground and potentially hunting small prey in competition with non-avian dinosaurs. Its closest evolutionary relative has been identified as Zhengheornis, another early bird from Fujian.
The discovery raises new questions about early avian history. Researchers cannot yet determine whether Yuezhuornis evolved from ancestors that could already fly and later lost the ability, or if its lineage followed a separate path to terrestrial adaptation. Because scientists currently have only one incomplete specimen, additional fossils will be needed to fully resolve its history.
Source: dinosaur fossil discovery - BingNews · Published October 18, 2026 · Photo by Miguel Collado on Unsplash