Remains of one of the world's first birds that flew above the dinosaurs 120 million years ago have been unearthed in Japan. About the size of a pigeon, the creature had grey and brown feathers. It could shake its tail, and possibly flap its wings, according to scientists. Named Fukuipteryx prima, its remarkably preserved bones were found entombed in rock that dates back to the Early Cretaceous period. This is the period when real birds were beginning to appear. Fukuipteryx is the first primitive bird from this time found outside China.