The painful story of an Eagle

An eagle can live up to 70years, but to reach this age, the eagle must make a hard decision. In it's 40th year, it's long and flexible talons can no longer grab a prey which serves as food. It's long and sharp beak becomes bent, the feathers become old, thick and heavy. The thickyand heavy feathers sticks to it's chest making it difficult to fly.
At this stage, the eagle is left with only two options: DIE or go through a painful process of CHANGE. The process requires that the eagle fly to a mountain top and sit on it's nest and then knocks it's beak against a rock until it plucks it out, then wait for a new beak to grow back and then pluck out it's talons, then wait for a new talons to grow back, then starts plucking it's old aged feathers and after this the eagle takes its famous flight of rebirth and lives for 30 more years.