Helmaroc King

The Helmaroc King is a monstrous bird that was manipulated by the evil Ganon. The bird was designed to do dirty deeds for Ganon and one of them was to soar the skies and search the many islands for young girls with pointy ears(A Hylian trait) and then kidnap them. The very same bird is responsible for the kidnapping of Link's sister, Aryll. This bird wears a protective stone mask which requires a heavy weapon to destroy. Once it is destroyed he is very vulnerable and shouldn't be a problem for you.

In Four Swords Adventure, this boss was designed to stop you from entering the Tower of Flames. This monstrous bird would swoop down up Link twice, then drop rocks upon him and his clones, then repeat the process. To defeat this boss, Link would have to daze the bird then destroy the mask. After the mask was destroyed, then he could finish the job easily.