What are the characteristics of spiders Knowledge and characteristics about spiders

The characteristic of spiders is that they can weaveSpider websSpiders are good at using spider webs to catch small animals such as flies and mosquitoes. Then eat them. The spider body is divided into precursor and posterior body.

No more than 12 in one eye. dioecious, mostly terrestrial.

Only a few spiders are waterborne. Most arachnids.

It is carnivorous, and it breathes with the lungs or trachea, and some have both.

The habits of spiders

Spiders hunt and use fangs.

Paralyze each other, then secrete saliva to dissolve the prey, and suck it slowly, so that the food is clean, as if the female spider eats the male spider after mating. Spiders are afraid of light, so they build webs and spider silk on places that transmit light and wind.

It can be used to snare prey, or it can be used to wrap leftover food for the spider to eat next time.

Spiders love to be clean, and they have a clear distinction between places to eat, sleep, and pull, and domestic spiders generally use the edge of the cage as a garbage dump where they urinate or throw away food scraps. Picky eaters, eating only one or two meals a month, the longest can go on a hunger strike of two months, and their diet is mainly crickets.

Grasshoppers, etc., have little water demand, and can be raised until adulthood, about seven years, without changing cages.

Most round spiders use the least amount of silk to weave the largest web, which acts as an air filter to trap insects that do not see filaments and are not very flying. Although the web is complex, it can be woven within an hour, and most of them are completed before dawn. If the net is destroyed during predation, a new net is woven.

Spiders have the following characteristics: they have eight single eyes, four pairs of legs, arthropods, etc.

The body of a spider is divided into a precursor and an afterbody, and generally has eight single eyes. Spiders are dioecious, most spiders are terrestrial, and a small number of spiders live in water. In addition to this, spiders also have personality traits such as being afraid of light, loving cleanliness, and picky eaters.

Most spiders are poisonous, when preying on live prey, first bite each other with venomous fangs, let the tooth poison flow into the prey, so that the other party is paralyzed after poisoning, unconscious, and then secrete saliva that can dissolve the prey, so that it dissolves, and slowly sucks the food after dissolving, until the prey is sucked clean, there is nothing left.

Classification:

According to the literature, there are 3,821 genera and 42,055 species of spiders in the world (2010), and about 3,800 species in China, belonging to 67 families. There are a total of 14 orders in the Arachnida, 5 of which have been extinct, and 7 orders have been discovered in China. There are 42,751 species (subspecies) of spiders in 3,859 genera and 110 families in the world, and there are more than 3,800 species in 67 families in China.

1. Appearance characteristics: the body is divided into precursors and posteriors, no more than 12 in one eye, dioecious, and most of them are terrestrial.

Only a few spiders are waterborne.

2. Feeding characteristics: spiders mostly feed on insects, other spiders, and myriapods, and some spiders will also feed on small animals.

3. Life characteristics: The lifestyle of spiders can be divided into two categories, namely nomadic and sedentary. The nomadic type is a spider that hunts everywhere, hunts, has no fixed residence, does not build webs, does not burrow, and does not build nests.

The sedentary type has some nets, some digging burrows, and some nesting as fixed dwellings. Such as wall money, stone-like spiders, etc.

Spiders: are terrestrial ecosystems.

The most abundant predatory natural enemies play an important role in maintaining the stability of agricultural and forestry ecosystems. The body is 1 90 mm long, and the body is divided into two parts: cephalothorax (anterior) and abdominal (posterior), and the cephalothorax is covered with dorsal armor and chest plate. There are two pairs of appendages in the cephalothorax, the first pair is chelicera, with chelicera, and the tip of the chelicera has a toxic gland opening; The chelicerae of the rectal palatal suborder move anteriorly and backward, and the lateral and opposite movements of the palatal suborder; The second pair is whiskered, which are foot-like in females and immature males to hold food and act as sensory organs.