Woodpecker's mouth is straight and powerful, much like a chisel used by carpenters. While climbing on trees, he knocks on trees with his mouth, which is very fast. They can tell whether there are pests in the trunk by knocking on trees, and once they notice that there are insects in the trunk, they will stick their tongues in. Tick him out and eat him.

1. Insect-eating bird

Red-bellied eagle fan tail sand cone four-tone cuckoo big cuckoo nighthawk blue emerald three-treasure bird Dai Sheng black pillow green woodpecker spotted woodpecker blue wing eight-color partridge, mountain partridge, golden waist swallow, dark gray cuckoo, green bulbul, white-headed parrot. Red-tailed spotted thrush with brown neck, hooked mouth, black face and noise, thrush, reed warbler, yellow eyebrow, willow warbler, yellow waist, willow warbler, ribbon bird, big tit, three eyebrows, grass thrush

2. Rat-eating bird

Red-horned owl, carved owl, harrier.

yellow-rumped starlings, grey starlings and starlings, but sometimes there is no fixed dividing line between beneficial birds and harmful birds, and insect-eating birds may destroy crops when they are hungry.