A Polar eagle is an NPC used as a transportation medium between Eagles' Peak and the Rellekka Hunter area. The Eagle transport system can only be used after the completion of the Eagles' Peak quest. In order to travel using this bird, a rope must be used on it, to lasso it around its neck.
It is located past the stone door, inside the Eagles' Peak dungeon and also in the Rellekka Hunter area. They can be used to travel between each other. With the introduction of rope racks, ropes can be obtained from the dungeon, removing the requirement of having to bring your own rope, should you travel from Eagles' Peak.