Red Dragon
Red dragons were physically distinguished by their enormous size and wingspan, which was the widest of all dragons, both in absolute size and relative to body length. The outermost alar phalanx was extremely long and made the wing appear to taper, while the trailing edge was the longest section. The trailing edge joined the body behind the rear legs and partway along the tail.
And of course they were recognized by their scarlet and crimson scaled hides. A wyrmling had small, bright, and glossy scarlet scales (becoming pink on its belly), which turned dull and a deeper red by the time they were young dragons. In older dragons, the scales grew thicker and larger, and as tough as metal. In contrast to their red hide, their wings and neck frills turned a purple-gray, ash-blue, or blue-black toward the edges, similar to metal scorched in a fire, which darkened as they aged. The pupils of their eyes faded with age, such that especially old red dragons had eyes that seemed to be orbs of molten lava.
A red dragon had two large horns upon their head, which pointed backward toward their wings. These horns, which were big enough to be noticeable from below, could be either straight or twisted and any color from white as bone to black as night. They had smaller horns on their chin, cheeks, lower jaw, and in rows over their brow, as well as on their beak-like snout. They also had frills around their ears that often combined with their cheek horns as they got older and a backward-sweeping frill running down their necks and spine, from just behind the head to the end of the tail. The frills around the dragon's internal ears assisted its hearing, by collecting sounds and ascertaining directions. A red wyrmling had the two main horns, but the others were only stubs.
Genetic Ancestor(s)