Everyone knows that woodpeckers build their nests by pecking tree
trunks. The point many people do not consider is how woodpeckers undergo no brain
haemorrhage when they so strongly tattoo with their head. What the woodpecker does is in a
way similar to a human driving a nail in the wall with his head. If a human ventured to do
something like that, he would probably undergo a brain shock followed by a brain
haemorrhage. A woodpecker, however, can peck a hard tree trunk 38-43 times
between 2.10 and 2.69 seconds and nothing happens to it.
Nothing happens because the head structure of woodpeckers are created
as fit for this job. The woodpeckers skull has a "suspension" system that
reduces and absorbs the force of the strokes. There are special softening tissues between
the bones in its skull.