When using the Mask of Truth, a gossip stone told me this:
It seems the crows that fly near the town walls are fond of musical instruments …
I’ve tried playing my instrument as all races, but the crow just keeps on flying.
Does this text mean anything at all?
The crow is called a Guay.
The solitary Guay that flies around Clock Town in Majora’s Mask will
ignore Link until he plays one of the four Temple songs, at which
point it will begin dropping progressively more valuable Rupees.
You can read all about these guys here, although there isn’t much: Guay
Source : Link , Question Author : Jamie Hutber , Answer Author : FoxMcCloud