150-million-year-old toothed bird is earliest known case of flight loss

A 150-million-year-old fossil bird found in Fujian, China, had sharp teeth, a dinosaur-like claw and a body suited to life on the ground. Named Yuezhuornis yangyuanensis and described in Nature, the crow-sized species is the earliest known example of a bird lineage losing the ability to fly, scientists from China's Institute of Vertebrate Paleontology and Paleoanthropology say.