Target lock: Hrok
Hroks are bird enemies that appear in Skyward Sword. They are large birds found within the Lanayru Desert. They sit perched on top of dead trees, and take of if Link or the Beetle approaches them. To attack, they fly above Link and attempt to drop a boulder on him.
Since they never land on the ground, Link must use a projectile weapon to defeat them. Link can pick up a Bomb Flower with the Beetle and either drop it on the Hrok from above or run into it from behind. Later in the game, Link can shoot them down from a distance with his Bow and Arrows. When a Hrok is defeated, they drop a Red Rupee, which is worth 20 Rupees.