The eagle has the longest lifespan of its species at 70 years. However, as it reaches its 40s its talons and beak become less effective for hunting and its heavy feathers make flying difficult. The eagle then has a choice to either die or go through a 150 day process of renewal. It does this by knocking its beak and talons against rocks to remove them, then waiting for new ones to grow. It then plucks its old feathers to be reborn and allow it to live another 30 years.