With the development of flight and fire
breathing dragons could travel and survive in hostile environments, thus
spreading into most of the earth continents which had enough preys to sustain a
big predator such as dragons, muggles believe that the extinction of big
mammals such as mammoths and furred rhinos was caused by humans, had they known
the existence of dragons, they could link the charred bones and the bone
penetrations by claws of dragons to them instead. Dragons nowadays are found in
mountains as the ones who preferred woods or prairies provoked huge habitat
fires and with it the loss of possible preys, thus with the loss of their
primary food the ones who stayed in those habitats died of starvation, one
would have thought that evolution would have given up fire breathing as a
result, but seems like starvation never gave prairie and wood dragons a second
chance. Nowadays we see dragon with multiple colors suited for camouflage or
spikes suited for defense when fighting among each other for a mate, another
characteristic that changed is the wingspread distance allowing some dragons to
fly longer distances in order to migrate like birds through the seasons.