(Reuters) - Scientists have unearthed in southeastern China the fossil of a quail-sized bird that lived about 150 million years ago during the Jurassic Period and possessed surprisingly modern traits, a discovery that rewrites the history of avian evolution.

The short-tailed find with the forelimb of a raptor is an extremely rare example of the transition from dinosaurs to birds.

Scientists have discovered the oldest bird fossil shedding light on birds' origin in China, and reshaping the timeline of bird evolution.

Researchers have discovered a 149-million-year-old bird fossil in southeastern China, featuring a short tail structure that could rewrite the evolutionary history of birds. As detailed in a study published Wednesday in the journal Nature,

The bird has a short tail ending in a pygostyle, an important aerodynamic innovation moving the center of mass forward toward the wings.