Give some examples of beneficial insects and birds and talk about their detailed functions.

Bees are one of the insect groups that are beneficial to human beings. They pollinate crops, fruit trees, vegetables, grasses, camellia oleifera crops and Chinese medicine plants, and the yield can be increased by several times to twenty times. Honey is a tonic commonly used by people and has the reputation of "milk for the elderly"; Royal jelly is a kind of advanced nutrition, which can not only enhance physical fitness and prolong life, but also treat chronic diseases such as neurasthenia and anemia.

2. Dragonflies

Dragonflies are carnivorous insects. They prey on flies, mosquitoes, leafhoppers, midges, small butterfly moths and other agricultural, forestry and animal husbandry pests. Dragonfly is an important natural enemy insect beneficial to human beings.

It is a biological feature that dragonflies lay eggs in water. Their larvae (larvae) live in water and their life span varies from species to species. Dragonflies usually take 2 years, and some take 3 to 5 years. It can be used to monitor environmental pollution and has medicinal, edible and ornamental values.

3.swallow

Swallow is a general term for 74 species of passeriformes. Small size, narrow wing tip, short beak and concave tail, weak feet and few feathers. Feathers are monochromatic, blue or green, with metallic luster; Most kinds of men and women are very similar. Swallows spend a lot of time catching pests in the air. It is one of the most flexible birds, mainly feeding on insects such as mosquitoes and flies, and is a well-known beneficial bird.

4. Woodpecker

Woodpecker is a famous forest bird. In addition to killing pests under bark, such as longicorn larvae, the traces of chisel wood can be used as an indicator of healthy logging in forests. They feed on some pests, such as longicorn beetles, brown beetles, winged moths, smelly bedbugs, etc., and can eat about 1500 every day.

Because woodpeckers eat a lot and have a wide range of activities, in the forest of 13.3 hectares, if a pair of woodpeckers inhabit, more than 90% of insects can be pecked away in a winter.

5. Red corner _

The total length of red horn is about 20 cm. The upper body is grayish brown (brown chestnut) with dark brown moth-like fine lines. The panel is grayish brown with thin black lines; The collar is light brown; The base of ear feather is brown; The top of the head to the back and wings are covered with feathers with brown and white spots.

Perched in the mountains. Feeding on insects, mice and birds. Nest in the tree hole, each nest produces 4 eggs, white. Feather lines are like bark. Widely distributed in the mainland, it is a resident bird; Taiwan Province Province is a tourist bird. It belongs to the national second-class protected animals.