Quetzalcoatlus /kɛtsəlkoʊˈætləs/ is a genus of azdarchid pterosaur known from the Late Cretaceous Maastrichtian age of North America. Its two confirmed species, along with other azdarchids, were the largest known flying animals of all time. Azhdarchidae is a family of advanced toothless pterosaurs with unusually long, stiffened necks and giant wingspans. Its name comes from the Aztec feathered serpent god Quetzalcoatl. The type species is Q. northropi, named by Douglas Lawson in 1975.