I use two kinds of dragons in the Ashen Lands as well. The "True" Dragons and "Lesser" dragons.
The True Dragons are very rare, and represent your Chromatic/Metallic dragonkind. Narratively they're aloof and hidden, rarely seen.
Meanwhile Lesser Dragons are something you might come across while adventuring in the low to mid level range. Full grown, not babies, they don't get Lair Actions, or legendary actions, and are really just very large and somewhat cunning beasts. To the point where they can be raised and trained as flying mounts. Particularly -dangerous- flying mounts... But the smaller varieties only get up to about horse-sized and largely feed on fish and things smaller than your average wolf.
The True Dragons are very rare, and represent your Chromatic/Metallic dragonkind. Narratively they're aloof and hidden, rarely seen.
Meanwhile Lesser Dragons are something you might come across while adventuring in the low to mid level range. Full grown, not babies, they don't get Lair Actions, or legendary actions, and are really just very large and somewhat cunning beasts. To the point where they can be raised and trained as flying mounts. Particularly -dangerous- flying mounts... But the smaller varieties only get up to about horse-sized and largely feed on fish and things smaller than your average wolf.