Song Dragon
Native to the Forgotten Realms setting of Dungeons & Dragons, the Song Dragon, originally called the Weredragon, is a species of all-female dragons who can freely shapeshift into the form of beautiful human women.
In their natural form, these dragons are described as resembling female Copper Dragons, except that their scale color is iridescent blue and silver, although we don't know if this depicts variations or if both colors are present on the same individual. Unlike the Oerthian "Steel" Dragon, they have no characteristic tells in their human form, although they are invariably beautiful - minimum Charisma of 16 in Advanced Dungeons & Dragons. They possess potent magical abilities, and from 3rd edition onwards gained an innate affinity for the Bard class.
Song Dragons are whimsical but non-malicious and usually benevolent race, typically possessing an alignment of either Chaotic Neutral or Chaotic Good. Like Oerth Dragons, they are fascinated by mortal cultures and use their shapeshifting abilities to walk amongst demihumans. They have a particular fascination with music and storytelling, as their Bardic affinities suggests.
In AD&D, little is known about them other than this. One thing that is known is that they enjoy using their beauty to destroy men of a particularly evil or rapacious nature; they seduce and beguile such fools, sometimes going so far as to marry them, other times simply enticing them into lavishing them with wealth and expensive presents, but ultimately luring them to a secluded spot and taking up their dragon form to destroy them. This is one of the ways that the hoards of song dragons are swiftly stocked, although unusually for dragons they place far more importance on gaining the treasure to keeping it, and so readily spend their hoards on luxuries and charities. They also readily breed with both human men and male dragons who they find appealing, although such unions only produce more Song Dragons.
Song Dragons appeared in the Monstrous Compendium Appendix Annual #3 for Advanced Dungeons & Dragons and in Monsters of Faerun for Dungeons & Dragons 3rd Edition.