Not all early birds evolved toward better flight, Jurassic fossil suggests
The discovery of a 150-million-year-old fossil named Yuezhuornis yangyuanensis in China suggests that early bird evolution was not solely focused on flight. This species exhibits a mix of dinosaur and bird traits, including evidence of flight loss.
Why it matters
This finding challenges traditional evolutionary theories by showing that early avian development involved exploring diverse ecological niches rather than just improving flight.
edited by Gaby Clark , reviewed by Robert Egan
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Add to Preferred Sources Life reconstruction of the Late Jurassic bird Yuezhuornis yangyuanensis. Credit: Min Wang. For early birds, evolution wasn't always about becoming better flyers. This conclusion is supported by the recent discovery of a remarkably well-preserved, 150-million-year-old bird fossil from Fujian province, China, which is challenging long-held assumptions about early bird evolution.
A study published in Nature discusses the newly discovered species, Yuezhuornis yangyuanensis, which lived during the Late Jurassic period (150–148 million years ago). The research suggests that the evolution of the avian body plan was not a straightforward progression toward improved flight capabilities but a complex process involving the exploration of different ecological niches, including some that did not require flight.
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