Golden Nightingale

From OMGWiki

The Golden Nightingale is a song bird. In order to summon it, the Scroll of Golden Verse must be unsealed by the touch of a goddess's tears of love. Troubadour used Urd to unseal the scroll and call forth the bird. Troubadour's goal was to tame it and make the Nightingale sing on command. This was his qualifying test to be a true plum sprite (sort of like the first class goddess test). The size of bird is about half the size of an average adult male.

Appearance in the manga volume Miss Keiichi - Jealous Love.