In legends and myths there is mention of flying, magical reptilian creatures,in English we call them dragons.

Far from occurring in only one culture, we see the appearance of dragon-like creatures in many of the worlds folklore.

Why is this?

Is this pervasive myth based on remnants of a collective memory of such creatures?
Is the dragon really some sort of dream manifestation of an ancient and innate fear of snakes?

Who is to say why the whole world mythologizes a similar looking creature.

The Ljubljana dragon, the protector dragon of Ljubljana, capital of Slovenia from Wikipeadia