From Zelda Wiki, the Zelda encyclopedia
The Shadow Kargarok Rider appears when Link first travels to Lake Hylia in Twilight Princess. Fyer believes it was a customer at first, but then realizes it as a "monster". The Bulblin nearby on the lakebed then uses a patch of Hawk Grass to summon a Shadow Kargarok, which it then mounts.
To attack, Link must wait until the bird gets close to the ground and then jump on it. Upon doing so, he then proceeds to rapidly bite the rider. As the pattern is repeated the necessary times, the young hero must also take care to dodge the Fire Arrows from the rider until next time the bird tries to attack him with a closer attack. When the rider falls on the ground, Link battles it with physical attacks. With the rider being dead, Midna will take control of the bird so that she and Link can fly to Zora's Domain.
- This enemy is slightly similar to the Grim Creeper, the Evil Eagle rider from Link's Awakening, since both hop on a vulture-like bird and are defeated in a similar manner. Also, the Shadow Kargaroc Rider wears a mask that is very similar to the Grim Creeper's face.