Ancient Flightless Bird Fossil Uncovered in China, Expanding Understanding of Early Avian Evolution

A newly identified Jurassic bird species, Yuezhuornis yangyuanensis, discovered in China, suggests early avians had a more diverse range of lifestyles than previously thought. This flightless, terrestrial bird, dating back 148–150 million years, challenges the idea that all early birds were adapted for flight. Its fossil analysis reveals limb proportions similar to modern ground-dwelling birds, expanding understanding of avian evolution.