I have looked through the core rulebooks of all editions. You'll find the entries from first below. Second edition adds another paragraph called "Similar Species" to each entry which I have provided below as well. With progressing editions, the entries get continuously rewritten to become more obscure and less informative. Since dragons went from "there are plenty around and a few great named ones exist" to "there really are only named ones" in canon, this makes perfect sense.
The entries can be found on Page 180-181 in first and 222-223 in second edition. I figured people would want as much info as possible, so I took my copy from the shelf and typed up the entries. I tried to make exact copies sic erat scriptum, but won't rule out spelling errors on my part. The entry for Great Dragons contains a paragraph with a list of known Great Dragons which I have omitted. And before you ask, yes, the weigh number for the Western Dragon is not a typo.
Feathered Serpents
Alatuserpens Quetzalocoatlus
Identification: Most feathered serpents are 20 Meters in length from head to tail, have a wingspan of 15 meters, and weigh 6,000 kilograms. A feathered serpent is a long-bodied dracoform with one pair of wings and one pair of limbs. Its contour feathers and prominent feather ruff are often a dazzling rainbow of colors. Membranes stretch between the extended finger bones of its large wings. Behind the wings are a pair of limbs that end in paws for ground locomotion. There feet have five digits, one of which is like an opposable thum, giving it sufficient flexibility to manipulate objects. The skill contains 60 teeth. Some specimens have a tall spine connected to a poison sac, and some have a pair of fangs similarly equipped. The data gathered to date have been insufficient to determine whether such individuals represent a subspecies of Quetzalcoatlus, or a completely separate species of Alatuserpens.
Similar Species:Similar in form, shape, and habits, though unfeathered, is the common European wyvern (not included in this selection).
Hahibat: Mountains, open forest, and grasslands
Eastern Dragon
Draco orientalis
Identification: The Eastern Dragon's head and body measure 15 meters, its height at the shoulder is 2 meters, it tail is 15 meters long, and it weighs 7,500 kilograms. It has a serpentine or lizard-shape, with a broad, low head adorned with a fringe of whiskers on the chin and along the rear portions of the skill. Pairs of horns rise from behind the eyes and a pair or barbules descent from beneath the pronounced nasal region. Scaly armor covers the body, neck, and tail, which are surmounted by a ridge of membrane-connected spines. The highly dexterous paws are four-fingered, with each digit ending in a large claw; captive specimens have been taught to handle fragile porcelain vases without mishap. The commonest pattern of Eastern Dragon coloration is iridescent green with golden whiskers and belly scutes, but other color patterns are known. The Eastern Dragon's skill has 40 teeth.
Similar Species:The sirrush (not included in this seleciton), indigenous to Asia Minor, appears quite similar, but its limbs are longer and its tail shorter. Its head is narrower and deeper, and it lacks whiskers and barbules. The digits of the sirrush's hind paws are all forwards-facing and show limited dexterity, though the paw structure is reversed in the most famous ancient rendition of a sirrush, which is pictured on the Ishtar Gate.
Habitat: River valleys, mountains, and coastal cliffs.
Western Dragon
Draco occidentalis
Identification: The Western Dragon's head and body are 20 meters long. It is 3 meters at shoulder height, its tail is 17 meters long, and its wingspan is 30 meters. Its adult weight is about 2,0000 kilograms. The Western Dragon has four limbs and a pair of wings. Its horned head is mounted at the end of a long neck. Only its forepaws exhibit the opposable digits and the dexterity of other dracoforms, with the hind paws adapted into feet. Dorsal spines and/or membranes may be present. The Western Dragon is usually a single color, though darker along the spine, wth a pale belly. Some specimens have dermal armor formed of bony plates, in addition to the normal heavy scales. Others have small, non-overlapping scales that lend the appearance of smooth skin. The Western Dragon's skill has 40 teeth.
Similar Species:The common European wyvern (not included in this slection) is often mistaken for a western dragon, especially at a distance or in aerial maneuvers.
Habitat: Mountains, fens, bogs and dense forests.
Great Dragons
Drago sapiens
Identification: The Great Dragons are extremely large specimens, often up to 50 percent larger than typical lesser dragons. All of the common dracoforms have Great Dragons among them. Size is usually the best indication that an individual is a Great Dragon, but is not entirely reliable.
These creatures claim that they descend from a common lineage, though have provided no details or proof to back ip this assertion. Therefore, despite the differences in their physical appearance, these rare and powerful creatures are grouped in a single entry. All Great Dragons are intelligent, being conversant in at least one Human language and often many. They are also all magicians of great power.
Habitat: Wherever it wants.
