 The specimen preserved along with an egg (nicknamed "Mrs T"), described by Lü and colleagues in 2011, offers insight into the reproductive strategies of "Darwinopterus" and pterosaurs in general.Like the eggs of later pterosaurs and modern reptiles, the eggs of "Darwinopterus" had a parchment-like, soft shell.In modern birds, the eggshell is hardened with calcium, completely shielding the embryo from the outside environment.