Spiders vary in length from 0.05 mm to 60 millimeters. Separate the body, chest, and abdomen. Some of the species on the back of the head and thorax (or not), head cuirass front chest usually has 8 monocular (there are 6, 4, 2, 0, the) arranged in 2 to 4 rows. There is a large ventral chest plate, a lower lip two front frontal chest. The abdomen is divided, and the abdominal stems are evolved from first abdominal segments (seventh segments). The abdomen is round or oval in shape, some with various protuberances, and the shape is peculiar. Venter spinnaret by appendage evolved, a few original species have 8, position slightly near the front; most species of 6 spinnaret, located in front of the anal body back with 4 species; there are some spinning machine, spinning machine has many spinning tube, even in a variety of silk gland, by spinning tube spun silk. The sense organs have eyes, all sorts of sensory hairs, auditory hairs, musical instruments and tarsus.
Effects: contaminate food, spread diseases.
Spiders are not only male and female, but smaller than female, and they have different colors, such as the male color of the jumping spider family is bright, the female body is dull, and the male of the spider family has red markings on the back, and the female is all green.
Spiders prey mainly on small insects. The water spider can prey on small fish, huwena bird (said, but no exact records), the South American spider to a length of 7.5 centimeters or even prey on small rattlesnake. Retiary in net predation. The female spider spinning into an egg bag, containing eggs, egg bag attached to the Internet (web spiders), or the middle of the stone, the leaf. Some female spiders guard eggs, and they also carry eggs. The young spiders hatching egg shell still stay a few days in the egg bag, and took 1 to 2 times the skin inside the bag. The young spiders peel 4~10 times before they mature. Spider silk has played an important role in the life of a spider in. Networking is a kind of instinct of many kinds of spiders. There are many types of network, networking methods are not the same. Many spiders, especially young spiders, can use silk.
How do you make sure there are spiders?
Spiders live in the eaves or vegetation, often destroyed in the corner, the tree is not easy, grass and insects often haunt bear a gossip shaped net, the other side to side facing the sun, shade, such as along the house, sewer openings.
The toxicity of spiders is strong and weak, and a small number of spiders, such as the black widow (venom spider), are harmful to humans and animals. Such as Lycosa singoriensis Lycosidae distributed in Europe and Asia in two, Xinjiang Chinese common toxicity can be lethal to human and animal species; brown spider genus had hemolytic toxin, the wound tissue local necrosis and ulceration, and expands around; in addition, Theraphosidae, agelenidae, Clubionidae have to human and animal toxic species; some body hair can stimulate the skin, cause rash.
1) clean the cobwebs in your home with a broom;
2) use very low lime water to spray the ground and the corner and remove it in a few days;
3) we can choose the spraying of three chloro poison to human and livestock with low toxicity;
4) if it is in the countryside, to hang out in the plant where straw tied into a bundle, trapping spider into daytime habitat, then burn;
5) avoid them by burning mugwort leaves, mosquito coils and so on;
6) scatter all the windows in the house and the floor seams with sulfur. And put sulfur on all the frames of the house.