Guay

Guays are recurring enemies in the Legend of Zelda series. These small birds will attack Link by dive-bombing in his general direction. They also occasionally attack in flocks, which makes them harder to defeat.

The Legend of Zelda: Ocarina of Time
Guays appear in Lake Hylia, Desert Colossus, and at Lon Lon Ranch during the night. They re-spawn infinitely and after Link defeats enough of them, a Big Guay will appear. It is no stronger than a standard Guay, but it drops a high-valued Rupee when defeated.

The Legend of Zelda: Majora's Mask
Guays appear mostly near trees. A lone Guay can be found circling Clock Town in Termina Field; however, it doesn't attempt to attack. A number of Guays can be found flying around the pond in the Snowhead region during the spring and in Ikana Canyon.

The Legend of Zelda: Twilight Princess
Guays are found either alone, nesting in fir trees or on rocks, or swarming in flocks. They swoop down at Link and do not stop attacking him unless he goes out of striking distance. The Guay's appearance is different from that of the Ocarina of Time and Majora's Mask incarnations. They appear similar to vultures and have glowing blue eyes.

If Link dispatches an entire flock of Guays, rupees will drop from the sky nearby.