What are the natural enemies of spiders?

Spiders are distributed all over the world except Antarctica and are the natural enemies of many agricultural and forestry pests. They play an important role in biological control. Protection and utilization of spiders has become an important part of biological control. But there are also many natural enemies of spiders in nature. Let's take a look at what the natural enemies of spiders are.

What are the natural enemies of spiders?

There are many natural enemies of spiders. Toads, frogs, lizards, centipedes, bees and birds all prey on spiders. Some parasitic wasps live in spiders' eggs, some parasitic flies develop in spiders' egg bags, and almost all small-headed mosquitoes and gadflies parasitize into spiders in the form of larvae. Spiders often use a variety of methods to defend against enemies, such as excreting venom, concealment, camouflage, mimicry, protective color, vibration and so on. When you can't escape, and your appendages are caught by the enemy, just cut off your appendages and walk away. Anyway, the foot that breaks itself will regenerate when it molts.

What kind of food do spiders eat?

Spiders are carnivorous animals with a wide range of food, most of their food is insects or other arthropods, and sometimes prey on animals several times larger than themselves, such as South American bird spiders sometimes prey on birds, mice and so on. But the spider has no upper jaw and does not directly swallow fixed food. When the prey is caught with a net, the venom secreted by the venom gland in the chelate limb is injected into the capture prey to kill it, and the digestive enzymes secreted by the midgut are infused into the tissue of the prey torn apart by the chelate limb, which is quickly broken down into juice and then sucked into the digestive tract. In artificial feeding, locusts, crickets, butterflies, flies, yellow powder insects and other insects are the best quality feed for spiders.

The life style of spiders

1. Hunting type: a spider that travels everywhere, hunts, has no fixed abode, does not form a web, does not dig a hole, and does not build a nest. There are scaly spider family, bear spider family and most wolf spider family and so on.

2. Settlement type: some settlement spiders form webs, some dig holes, and some build nests as fixed dwellings, such as wall money, stone-like spiders and so on.

Common species of spiders

1. Bird-catching spiders: Brown all over, usually about 7 cm long, some up to 10 cm long, with the ability to build their own living nests, living in many caves around dry fields or places with weeds, lurking in caves during the day and going out to hunt at night, strong reproductive ability and high poison production. Each female spiders lay 300 to 500 eggs a year, and each 200 bird spiders can pick up 1 gram of poison at a time. Produced in Guangxi, Yunnan, Vietnam, Myanmar and other countries.

2. Chinese tarantula: the whole body is densely covered with black, white and yellow fine hairs, head, chest, back brown, with a yellowish brown longitudinal spot in the center. The front is wide and the back is narrow, the middle fossa is obvious, and the body length is 3-4 cm. For burrowing spiders, most of them dig nests in the fields of cotton, wheat, soybeans and other crops in the plain area. Produced in Shaanxi, Shandong, Henan and other provinces.

3. Baoluo new woman spider: the spider has a body length of 3 to 5 cm, dark brown on the back of head and chest, black chelate limbs, yellow tentacles, a yellow short rod spot in the front part of the center and a yellow lattice spot in the back half. Often active in orchards, rice, corn and other farmland crops and forests. In particular, the forest area is the most distributed, often in the plant or tree skills on the complex triple golden web, tie web spiders, good at preying on a variety of flying insects. Each female spiders breed 800 and 900 young spiders per year. Every 400 million 500 spiders can produce 1 gram of poison. The spider is found in various regions of southern China.

4. The white forehead cancer spider: the body of the spider is wide, short and flat, and its feet can stretch left and right. It is one of the common indoor spiders. It is good at walking and easy to escape. It lays eggs from May to June. Each female spider can reproduce 500 million young spiders. 600 spiders produce 1 gram of poison at a time. The spider is found in Henan, Shaanxi, Sichuan, Jiangxi, Guangxi, Hunan, Hubei and other provinces.

5. Furrow hard-skinned spiders: the body of the spider is 3-4 cm long, and the female spider has a yellow-brown body, a forked arrangement of head, chest and back, and long column-shaped chelate limbs. The sternum is grayish black with 8 small gray-white spots around it. The spider is cave-dwelling type, and its nest is tubular with radial spider silk around the mouth of the cave. Each female spiders breed 800 million spiders per year, and every 800 million spiders can produce 1 gram of venom. The spider is mainly distributed in Shaanxi, Shandong, Sichuan, Jiangxi, Guizhou, Yunnan and other provinces.