Seagull

Link can control them in TWW using a Hyoi Pear. At the Forsaken Fortress, several of them circle around the window of the room in which Aryll is being held captive. They sometimes fly alongside The King of Red Lions, Link's boat.

Link's telescope from Aryll is decorated with seagulls on one side.

If you get through Link's Awakening without dying once, Marin will be transformed into a seagull.