Woodpeckers can peck pests on trees, so how do they find pests on trees?

Woodpeckers have a natural "scalpel", which is a mouth shell like a steel chisel. It has been passed down from generation to generation and feeds on insects. When it stopped in the tree, it raised its "scalpel" and knocked on the east and west, from the sound of knocking on the trunk.

Know where the pests lurk, then peck a small hole in the tree, put a slender tongue in it, and hook the insects out with the mucus and small hooks on it to eat. Although pests are hidden deep in the trunk, once they are found by woodpeckers, they can't escape.

According to the investigation, woodpeckers are diligent and never lazy, knocking on the trunk 500-600 times a day. In recent years, some people have calculated that the impact speed of woodpeckers pecking trees is 2080 kilometers per hour through high-speed photography; When the woodpecker's head bounced back from the tree, the impact of its deceleration was also amazing.

Woodpeckers are called woodpeckers because they often peck holes in trees, eat worms in holes and build nests in pecked holes. Its mouth is sharp, several inches long, and its tongue is longer than its mouth.

Its claws are also hard. After pecking insects with its mouth, it hooks them out with its tongue and eats them. This is a useful bird. It is a common resident bird, and there are green woodpeckers and spotted woodpeckers widely distributed in China. They feed on pests such as longicorn beetles, brown longicorn beetles, winged moths and stupid insects, and can eat about 1500 (? Need ornithologists to verify). Because woodpeckers eat a lot and have a wide range of activities, if a pair of woodpeckers live in a forest of 13.3 hectares, they can peck more than 90% of brown beetles and 80% of longicorn beetles in a winter.

There are about 180 species of woodpeckers and woodpeckers (true woodpeckers), which are famous for looking for insects in bark and digging holes in dead wood to build nests. Except Australia, New Guinea and Antarctica, it is almost all over the world, with the largest number in South America and Southeast Asia. Most woodpeckers are resident birds, but a few temperate species, such as yellow-bellied woodpeckers and flapping woodpeckers in North America, have migratory habits.