This 150-million-year-old bird had dinosaur teeth and a strange secret
A 150-million-year-old fossil named Yuezhuornis yangyuanensis reveals that early birds possessed dinosaur-like teeth and claws. The discovery suggests that some early bird lineages evolved to live on the ground rather than focusing solely on flight.
Why it matters
This fossil challenges traditional evolutionary timelines and demonstrates that early bird development was more diverse and complex than previously understood.
A remarkably preserved 150-million-year-old bird fossil discovered in China is challenging long-standing ideas about how birds evolved. Rather than developing increasingly sophisticated flight abilities, some of the earliest birds appear to have taken a very different evolutionary path, including losing the ability to fly altogether.
The newly identified species, Yuezhuornis yangyuanensis , lived during the Late Jurassic period (150-148 million years ago). Described in a study published in Nature, the crow-sized creature provides evidence that early bird evolution was much more complex than scientists once believed. Instead of evolving primarily to become better flyers, ancient birds were adapting to a variety of environments and ways of life, including those that favored living on the ground.
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