I have no idea who came up with this crazy story but it's repeated multiple times on the interwebs...Gotta love the freedom to make stuff up.
The Story of an EAGLE:
The Eagle has the longest life-span of its species. It can live up to 70 years.
But to reach this age, the eagle must make a very difficult decision!
In its 40th year, the eagle’s long and flexible Talons can no longer grab a prey which serves as food.
Its long and sharp beak becomes bent.
Its old-aged and heavy wings, due to their thick feathers, stick to its chest and make it difficult to fly.
Then, the eagle is left with only two options: DIE or go through a painful process of CHANGE!
This process lasts for 150 days (5 months)
The process requires the eagle to fly to a mountain top and sit on its nest. There the eagle knocks its beak against a rock until it plucks it out.
Then the eagle will wait for the new beak to grow back after which it will pluck out its talons. When its talons grow back, the eagle starts plucking its old-aged feathers.
And after this, the eagle takes its famous flight of rebirth and LIVES for 30 more years!!