A long time ago, back before the ease and versatility of digital cameras proliferated --and rendered my photographic skills obsolete-- I took a telescopic picture of the moon. I remember it involved removing a telescope's eyepiece assembly and aiming through the objective lens from six feet back. As with many things done a long time ago, I look now and wonder --how the heck did I do that?
Señor Cirlot says dragons are linked with color symbolism, that red ones are guardians of higher science and "...the white dragon is a lunar dragon". This, of course, sends the serious scholar straight to the moon. Cicero noted that "Every month, the moon completes the same trajectory completed by the sun in a year." This makes the moon very useful as an instrument of prophecy --much like the minute-hand of a clock, or a clock to a calendar. But you need dragons.
When the moon completes these exertions in spacial-temporal-metaphysics it needs some sort of expression, some voice, and so creates the lunar dragon who says, "How the heck did I do that?"