The woodpecker bill's chisel-like tip is kept sharp by the pecking action on wood. With their smaller bill size, many piculets and wrynecks will forage in decaying wood more often than woodpeckers. The long sticky tongues, which have bristles, help the birds grab and extracting insects from deep in a hole of a tree. Detailed studies published in 2004 showed that the tongue wraps around the prey before being pulled out.