Pterodactyls could fly, and birds at the time lacked the size and power to bring them down. If a pterosaur could get airborne, it was invincible. read more
Pteradacylus was too small to defend itself. However, it could escape by flying away from a threat. read more
Pterodactylus was small and lightly built, thus it wasn't well adapted to fight in self defense. However, they could have easily flown away from predators as long as they weren't taken completely by surprise. read more