Kargaroc

Kargarocs are recurring enemies in the Legend of Zelda series. They are huge birds of prey.

The Legend of Zelda: The Wind Waker
Kargarocs inhabit different perches on the Great Sea, though are particularly known for nesting on Dragon Roost Island. Wild Kargarocs are protective of their nests and will attack those who get nearby. Their nests are often build on top of tall, narrow rocks. When they are not attacking, their voice is similar to that of a sheep. They also tend to not get along with seagulls, as they will attack any that wander too close to their nests.

Kargarocs under the employ of Ganon were often used for transporting Bokoblins and Moblins into battle. The ability to carry such large creatures suggests the Kargarocs are rather strong flyers. They are known for perching at Pirate Outposts as well. When Link uses the Grappling Hook on the Kargaroc, he steals a few of their Golden Feathers, which are particularly prized by Rito collectors.

The Helmaroc King also seems to be a giant Kargaroc wearing a helmet.

The Legend of Zelda: Twilight Princess
Kargarocs can be found flying around Hyrule Field, and are also common in the City in the Sky and Hyrule Castle. This time, they are more leathery than feathery in appearance, and are seen carrying and dropping bombs at one point in the game. They have forked, whippy tails and rooster-like crests, giving them an almost cockatrice-like appearance. One gigantic Kargaroc appears as a mini-boss when first met in the Twilight Realm, and then is used as a means of transportation afterwards.

In the Twilight Realm, there exists another types of enemy that serves as the Twilight version of the Kargaroc known as Shadow Kargarocs. These are recognizable due to their trumpet-like heads and the trumpet-like sounds they emit.

Etymology
The name "Kargaroc" has two possible derivatives, the first being a "Roc" (as in Roc's Feather or the mythical bird) and the second being "Kargasaur" from an earlier Zelda game. It is also possible that it is an amalgamation of the two.

Another possible origin could be of "Roc" and an adaptation of the word "cargo", as the creatures are often seen carrying objects.