Although the time that dragons first appeared in earthly and celestial stories is lost in the mist, they have been traced back to approximately 4000 B.C.

Celtic Dragon.

Celtic Dragon.
“We ought, instead of simply dismissing unusual beliefs out of hand, to be wondering why they are so widespread and so resilient — and trying to find out what they mean. In the course of human evolution, a change of mind, a new idea, can have as much survival value and adaptive significance as the mutation of a gene.”
The Dreams of Dragons:
An Exploration and Celebration of the Mysteries of Nature

Lyall Watson.

Celtic Dragon.Dragons are said to be able to live almost anywhere, depending on the type of dragon. Their habitats range from the center of the earth to the middle of the ocean and in the skies throughout the universe. They can also be found in caves, fire, or anywhere dark and damp.

Dragons of the world include:

Dragon Guardian Scroll.