This is a concept for Dragon Cave, suggested by Hawktalon.
These dragons are born with a few long hairs on their tails, which eventually fuse to become "harp" strings. The female's tail is in the style of a lyre, while the male's is more like a traditional harp. The dragons pluck the strings in order to find a mate that compliments their own unique song.
The color scheme is meant to mimic colors you might find on a concert harp. Many that I have seen are pale wood with gold scrollwork, which I tried to reflect here with both colors and wing patterns. The dark mane was inspired by darker harps, and also helps the "strings" show up better.
Please do not use without permission!