I've always wondered if dragons existed or not. I believe there may have been a creature similar, but nothing 'dragon' like. I could imagine seeing a giant reptilian creature, with giant wings to match its size, coming down from the sky and burning a whole village alive. I would imagine that it would be the worst sight ever and there's no way to stop it. I wouldn't fight a dragon. Unless I was to be an adventurer. But that's a different story. The massive beasts probably came in different forms. They would've been the biggest strongest creatures on Earth, there's no doubt they would've adapted to other habits. They would've evolved around their environment. Natural predators usually use their surroundings to hunt. Meaning, they would adapt different camouflage or colors, hunting abilities, and keen performance for their survival in new lands, or waters.