Hard-headed facts.

Natural selection would obviously favor physiological and morphological modifications protecting woodpeckers from concussions and long-term brain damage. FROM THE EXPERTS ATTRACTING BIRDS ONE OF THE great pleasures of winter is listening for drumming woodpeckers. One of the most-read articles on the BirdWatching website, written by the late Eldon Greij in 2013, is titled "Why woodpeckers can hammer without getting headaches", an overview of the ways scientists have speculated that woodpecker anatomy protects the brain. [Extracted from the article]