Dragons
Basic Information
Ecology and Habitats
Fire
Fire dragons tend to congregate around heat sources. There are no volcanos in the Dragon Nation per se, but there is one rocky area where you may find a couple rivers of lava. They also enjoy hot springs and often fight over the locations with water dragons.
Water
Water dragons prefer the coastal regions where they can be near the vastness of the ocean. Smaller, or newer, clans that don't have a coastal territory will often fight over hot springs inland with fire dragons. The smallest clans must make do with underground springs and will sometimes enlist the aid of earth dragons to help them find the springs and where they make their way to the surface.
Air
Air dragons are generally considered the nomads of the dragon species and will wander from place to place as the wind takes them. Many can be found surfing the currents through a storm. Many a villager has stories of being rescued by these air dragons when a particularly nasty storm was about to hit.
Earth
Earth dragons have little trouble finding a home, as they either inhabit an existing cave or shape their own. From there, they dig deeper into the earth to uncover treasures for their hoard. If you run across a cave in the Dragon Nation, it will almost always have an occupant and the people know better than to go searching for the hoard inside.
Flora
Flora dragons also wander, but not to the same extent as the air dragons do. They nurture trees into the shape of shelters near to large clearings that they can create volumes of flowers in. Flora dragons also have an inherent knowledge of and tolerance to all poisons and do cultivate poisonous varieties in and near their homes to protect themselves.
Fauna
Fauna dragons tend to inhabit caves like earth dragons, but closer to human settlements than most earth clans are willing to do. They also spend much of their time in areas where there may be congregations of a certain bird or animal that they want to learn how to imitate. As fauna dragons are shapeshifters and understand language, they don't have much of a preference for habitat as long as it gives them the chance to meet and learn about other species.
I love the information you have included about your dragons.