Dive Attack. If the quetzalcoatlus is flying and dives at least 30 feet toward a target and then hits with a bite attack, the attack deals an extra 10 (3d6) damage to the target.
Flyby. The quetzalcoatlus doesn't provoke an opportunity attack when it flies out of an enemy's reach.
Bite. Melee Weapon Attack: +4 to hit, reach 10 ft., one creature. Hit:12 (3d6 + 2) piercing damage.
This giant relative of the pteranodon has a wingspan exceeding 30 feet. Although it can move on the ground like a quadruped, it is more comfortable in the air.