Woodpecker

Woodpecker.
pecking the tree with its beak, the woodpecker never experienced brain injury.
What a secret
when selecting wood, generally woodpeckers aiming for trees that have been fragile due to weathering the fungus, so more easily destroyed.
Patukan is also generally implemented in a glance then, not just a quick stroke, so not so hard for woodpeckers,

Some types of woodpeckers often run super-fast recurring sticks to attract the attention of the opposite sex and keep the location of power.
They do it on the surface of the resonant, like the bark of a hollow tree, so the tone is made hard but does not make their head hurt.

Another secret, the white crow crow is the brain has a small size, just 0, 07 ounces.
The larger the size and mass of the brain, so the greater the risk of brain injury, the woodpecker's mouth makes it easy to bundle the logs.