This "hook knife device" can make the tongue stick out of the bird's mouth 12cm. In addition, there are short hooks on the tip of the tongue and mucus on the surface of the tongue, and the tongue can reach into the hole to catch more than 30 kinds of trunk pests. No matter how deep pests or eggs hide, they can't escape the tongue. Woodpecker knocks on trees about 500 to 600 times a day and pecks at wood very frequently, so its head is bound to get very violent vibration, but it will neither have a concussion nor a headache.
It turns out that woodpeckers have at least three layers of shock-proof devices on their heads. Its skull is loose and full of air, and there is a tough outer meninges inside the skull. There is a narrow gap between the outer meninges and the fluid-containing brain pulp. This will reduce the fluid transmission of shock wave and play a role in shock absorption.
Because sudden rotational movement is more likely to cause brain damage than linear horizontal movement, it has developed and powerful muscles on both sides of its head, which can play a role in earthquake prevention and shock absorption.
A woodpecker can kill thousands of pests hidden in the trunk every day, and feed hundreds of bugs to the little woodpecker every day during the brooding period.
Woodpeckers widely distributed in China are green woodpecker and spotted woodpecker. They feed on pests such as longicorn beetles, brown beetles, moths and stupid insects, and can eat about 1500 every day. A pair of woodpeckers can protect hundreds of acres of forest from pests, so people say woodpeckers are "guardians of the forest"!
woodpecker