The petrified bird was a female.Archaeologists found the skeleton of a creature that lived 110 million years ago, reports the Chronicle.info with reference to hyser.com.ua.
The event happened in North-West China.
The bird belongs to the family Avimaia schweitzerae.
The petrified bird was a female, and its belly was found the egg. Experts believe that the egg was the cause of death of poultry, it was too long in the body of females, and she was unable to postpone it.
Chinese archaeologists believe that this is one of the most interesting excavations of the Cretaceous period.