When the first rays ......of the morning sun shine through the woods, the "tree doctor" woodpecker was on time. It hits the trunk of a tree with its sharp beak, and behind this seemingly simple action, there is an amazing survival wisdom hidden!

More than 25 violent impacts per day are equivalent to us hitting a wall with our foreheads at a speed of 0 km/h. Children must be worried, will the woodpecker have a "concussion"?

It turns out that the woodpecker's skull structure is gifted, and its skull is like a sophisticated shock-absorbing system.

The front of the skull is made up of honeycomb-shaped, loose bone, a foam-like structure that absorbs impact. The back of the skull that wraps around the brain is also unusually dense, like a carbon fiber shell for the brain. What's more, its cerebrospinal fluid content far exceeds that of other birds, like a liquid cushion in the cranial cavity. Triple protection works in tandem to disperse the energy generated by the impact to the entire head in 1 milliseconds.

Observational data from the Institute of Zoology of the Chinese Academy of Sciences shows that woodpeckers precisely adjust their body angles before pecking to ensure that their beaks are always perpendicular to the trunk. This precise mechanical control allows the impact force to form a perfect straight line along the beak-skull-spine, avoiding lateral torsional forces.

In addition, they always press their tail feathers against the trunk before pecking, a seemingly random gesture that is actually a hidden mystery. It turns out that the tail feather shaft of the woodpecker is 3 times harder than that of other birds, and it can be firmly nailed into the bark of a tree like a pickaxe. When they peck continuously, their strong tail feathers and claws create a solid triangular support system on the trunk. This not only ensures the efficiency of the force, but also avoids the secondary damage caused by the rebound of the body.