The rebirth of e

E is the longest-lived bird. It miraculously lives to 70 years old, more than the vast majority of animals in the world. However, some e die when they are 40 years old, and only about 3 years old can live to 70 years old. Why?
It turns out that when an e is about 40 years old, its beam will become curved and fragile, and its prey will not be squashed with a single blow; its claws will become blunt due to perennial prey, you cannot catch a running rabbit. the feathers on both wings are heavy and cannot fly freely. At this time, e has two options: one is to return to the nest and wait quietly to die, the other is to get a new life through the long suffering of 150 days.
If an e chooses to be reborn, it must fly to the top of the cliff to build a nest there. Then it will endure hunger and pain and beat its beam on the rock day after day until it falls off. When the new beam grows, the e must use the new beam to pull the blunt claws one by one until the new and sharp claws grow. After these two pieces of work are completed, the Hawks will also pull out the thick and heavy feathers from the wings so that new feathers can grow out. When the 150-day journey passes, the Eagles can regain 30 years of new life and soar in the sky again.