Jeholornis

Jeholornis (meaning "Jehol bird") is a genus of Mesozoic birds that lived approximately 120 million years ago during the Early Cretaceous of China. Fossil Jeholornis were first discovered in the Jiufotang Formation in Hebei Province, China (in what was previously Rehe Province, also known as Jehol—hence the name) and additional specimens have been found in the older Yixian Formation.

Jeholornis had long tails and few small teeth, and were approximately the size of turkeys, making them among the largest birds known until the Late Cretaceous. Their diet included seeds of cycads, Ginkgo or similar plants.