I have three species - Dragonborn, Tyres Haul and Al'Galue.
The Al'galue came to Amberos from another realm, fleeing some ancient disaster to their old world. They brought strange machines with them and were persecuted by humanity for these devilish devices. Those that survived these ancient purges isolated themselves in remote regions and developed clannish tendencies. Al'Galue have cosmetic tails and wings. Some Al'galue can fly, though many of the surviving tribes have lost their ability to fly. Al'Galue cannot use their maws for biting and their claws are too weak to use for combat. However, they are naturally talented in illusion magic, having used it to hide their appearance from other races.
Dragonborn are the result of alchemical infusions that eventually led to the appearance of a new race that bred true. Others claim to be the children of dragons, manipulated into human form for reasons now long lost and forgotten. Most Dragonborn come from the Federation, the homeland of the dragons, and they were born and bred originally for the First Dragon Wars. The dragonborn are varied, though they have claws and a bite
The Tyres Haul claim they are the direct offspring of elvin and dragon unions, or in some tales spawned from alchemical attempts by elves to emulate the dragon form. There is inconclusive evidence for either origin, though it is clear that the Tyres Haul have existed as a distinct race for many millennium. The Tyres Hauls are natural fliers. They rarely have tails, though some can use their claws or maw in combat.