The hawk is in the world the life longest birds, its life the age may reach 70 years old. Must live that long life, it when 40 years old must make the difficult actually important decision.By now, its beak became long bends, bumped into the chest nearly; Its claw starts to get older, is unable to catch the game effectively; Its feather is long also thickly also is thick, the wing becomes extremely heavy, causes the soaring to be extremely strenuous. This time hawk only then two kind of choices: Either waits for death, either passes through an extremely painful renewal process - - 150 day long transformation.It must the earnest efforts fly the summit, builds the nest on the cliff, and pauses in there, does not have to soar. The hawk first uses its beak to strike hits the rock, falls off completely until it, then calmly waited for the new beak long comes out.The hawk can use the beak which new is long toenail which gets older the claw on to capture, blood a little bit sprinkles.After the new foot head of a jia comes out, the hawk then uses new toenail to capture body on feather one one. After 5 months, the new feather long came out, the hawk makes a fresh start the soaring, again once again crosses for 30 years years! This related hawk's article lets me feel the human regardless of has suffered the setback in any environment, the experience is poverty-stricken, all may stand.Because we are a more intelligent person. Translates English and attaches the impressions of after-reading