Dragonoids
Dragonoid lizards, or just dragonoids, are hexapodal reptiles by definition. There is no clean taxonomic divide between dragonoids and dragons, rather, dragons are simply dragonoids of sufficient size. Dragons' wings typically have a slightly different anatomical makeup to account for the size of the animal, but other than that, there are no set differences in morphology.
Most dragonoids are chase predators (often insectivores), made possible by their capability of flight, while lizards are generally ambush predators, relying more heavily on camouflage and patience. Some reptilian hexapods have six legs instead of four legs and two wings- these are typically not considered dragonoids, which are in part defined by their membranous wings.
Dragons
Dragons originated in the warm, wet Scaled Forests in the southwest of the continent, but have since migrated away to occupy some areas of the mountains and the prairies in the west. The prairie dragons are the largest, growing up to 13 ft tall- length variable. Some of these dragons are dangerous- predatory carnivores that feed primarily off of large herbivores, but are not picky, and know that they are large enough and quick enough to feed on humanoids when given the chance. But dragons are no more intelligent than any other animal, and therefore do not hold malice for humanoids, they are simply opportunistic.
Dragons are not usually social, though some species mate for life and/or raise young, and on even rarer occasions, can be found in basks of 3-5 individuals. Sociability usually scales inversely with size- smaller dragons are more likely to be found with mates or in basks than larger dragons, which live alone and rarely raise young. Even so, lone dragons are usually much less dangerous than social ones, as they have nothing to defend and are only interested in finding food and staying safe. Lone dragons can be scared or chased away- social dragons often cannot.