Whenever I see or hear a woodpecker chiseling into a tree, I ask myself the question, “How is it possible that the bills of woodpeckers never become dull?
I wish I were so lucky. Whenever I am using a wood chisel, after continued use I have to sharpen the tool’s steel cutting edge, yet woodpeckers seem to drive their bills into wood seeming without ever having to stop and sharpen their pointed bills.
Remarkably, every time a woodpecker strikes a blow against a tree it is chiseling away wood and sharpening its bill at the same time. What happens is the tip a woodpecker’s bill is covered with special cells that constantly wear off, leaving the bill as strong and sharp as ever.
It is as simple as that.