MirrorWings! Additional notes that I may have left out below in Notes and Credits
Additional notes: MirrorWings can change the appearance of their duplicates, which they can use to act like a decoy of sorts, or for plain trickery. The barbs at the end of their tails are also reflective, which is the property that allows the MirrorWings to create duplicates. MirrorWIngs can create more than one duplicate, and they can, in a way, act like a servant. They can interact with other things, though not at their own will. They are controlled by the MirrorWing they're duplicated from and are generally weaker than they're "owner". MirrorWings can also be named after things associated with light, such as Reflection, Shine, Bright, Dim, Glimmer, Bulb, Radiance, etc. and minerals such as Zeolite, Amphibole, Calcite, Muscovite, etc. When they hatch, they are born with a soft and fragile stub at the end of their tails. That stub will eventually harden as they grow and become metal-like and shiny. After a few years of hatching, a MirrorWing dragonet will be able to create their own duplicate.