Wyrmlings
Dragon mating habits are somewhat obscure, probably because those who have attempted to study their habits have been eaten. It is known that after mating a female dragon will lay a clutch of eggs which in a matter of months will hatch into slithering scaled wyrmlings. Wyrmlings are more snake like with long serpentine bodies and numbs where their wings will grow. Over a period of years they will develop legs and claws. Wyrmlings do not have a breathe weapon but their bite is a poisonous type in the kill you in hideous agony over a period of hours variety.
Wyrmlings inhabit the lair of the mother dragon and snatch food from any kills she hauls back with her. Their main purpose seems to be eating and growing while avoiding becoming food themselves. Dragons have been known to snack on their own young when no other ready game is available.
Snarling
Somewhere between the age of five and ten years a wyrmling dragon grows into a snarling. A snarling dragon has all the familiar features of an adult dragon including wings in most cases and a breathe weapon of fire or acid, lightning or cold depending on the variety. Snarlings flee from the territory of the parent dragon and usually vanish far off into the wilderness hundreds of miles from home. Some lazier offspring will flee the territory of the parent but fall into wandering in the lands nearby and this usually runs them afoul of any men, especially villagers or farmers living in the area.
Snarling dragons primarily hunt at night and sleep in hidden places in nearby forests, swamps or caves. They have no set lair of their own but will occupy a temporary one for a period of weeks or even months. During the night a snarling dragon will fill itself up on whatever it can get its greedy teeth around and farm livestock, crops and even peasants asleep in their beds make for easy pickings.
If a snarling dragon moves into an inhabited area the local villagers or Lord will place a bounty for its destruction.
A snarling dragon is any young dragon between the size of a very large dog and a horse.
Drake
Between the ages of twenty and fifty a dragon grows into a drake. A drake is typically twice the size and ferocity of a snarling dragon. Drakes are still young and mobile. They remain in this state for another fifty years and may range between entire Kingdoms or further in that time. Drakes are still mobile and they are usually the dragons that seek out older mates with established lairs and territories (hunts).
Drakes are large enough and tough enough to stand at the top of the food chain in most areas they wander into and for this reason they no longer operate as nocturnal creatures. Drakes make good use of their powerful wings and typically fly at high altitudes using their keen eyes to spot likely food.
Depending upon the variety a Drake will begin to enter the hibernation habits of a larger dragon. They will find a cave or other secure place to hibernate in during the winter or spring, summer or fall months of the year and will emerge hungry and ready for active hunting in the months immediately following.
Few wyrmlings survive to become snarling dragons and even fewer snarling dragons survive to be drakes and so full fledged drakes tend to be wary of large settlements or obviously armed bands of enemies which might pose a real threat.
Dragon
A drake grows into a fully grown dragon around the century mark in age. At this point they will seek out a ruin or some other defensible location or they will find what appears to be a location they can occupy and turn into a lair. They will work tirelessly to drive out any obvious threats from the lair and the surrounding landscape usually out to a range of five to ten miles in every direction.
The land surrounding a lair will become the full grown dragon's "hunt" and they will afterwards restrict their activities to this territory unless driven to take action outside of their hunt for some significant reason. As a dragon ages the months long period of their hibernation will increase until they emerge from resting for only a few months a year.
Dragons can live to a very great age as their metabolisms slow and their months of hibernation extend beyond the year mark. Very old dragons are known to hibernate for one, two, three or even five years in extreme cases.
Hibernating dragons are not so sleepy as to be easy victims to those who decide to hunt them.