I WONDER - How Did The Quetzalcoatlus Get Its Name?

Quetzalcoatlis, named after the Aztec deity Quetzalcoatl, had lightweight, air-filled bones that enabled flight. Recent studies suggest it could reach speeds of 80 mph by tucking its wings and diving, aided by its aerodynamic head and neck.

What estimated speed could Quetzalcoatlis reach while diving?

What features of Quetzalcoatlis contributed to its ability to fly?