Fun fact: Just before her eggs hatch, the female Gambel’s Quail calls to the chicks, who cheep to each other from inside the eggs. The eggs hatch in synchrony, with the chick cutting a neat hole in the largest part of the shell and leaving an intact piece of membrane to serve as a hinge—the chick pushes on the shell and opens the door that it has created. https://www.allaboutbirds.org/guide/Gambels_Quail/overview#
