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- Yellow spider sak
Yellow Sak Spider or Heyrakantium is a typical representative of predators. It feeds on small insects - aphids, ticks, caterpillars, moth. The most vibrant species live in tropical countries with a warm, humid climate. In the former CIS countries, in Russia a spider occurs in the summer. Lives in the forest, in the fields, edges, gardens, vegetable gardens, city parks. The resettlement of the yellow spider was promoted by climate change, a hot long summer.
Photo and description of appearance
The predatory spider is a small sak. The body of an adult is only 10 mm. In the range of limbs - 25 mm. Females are several times larger than males. The body consists of the abdomen, cephalothorax. Covered in dense shell. 4 pairs of legs, forelimbs help grab the victim, hold in the process of nutrition.
The abdomen is bright yellow. A little darker than the paws. The cephalothorax is massive, red-brown in color. Powerful jaws are pointed into the eyes, pointed, rounded at the end. With this piercing weapon, the predator breaks the carapace, the chitinous cover of the victim, and then injects poison.
On a note!
On the head there are 8 eyes that are piled up in heaps, but spider vision bad. The organs of smell, touch, located on the limbs help to navigate in the environment. The golden sack spider senses the approach of the victim, the enemy by fluctuations in air, web, smell.
The male has a tan cover, not as bright as that of females. The size of the spider along with the limbs barely reaches 15 mm. The main mission is to fertilize the female. After which the arthropod dies.
A photo of a saka spider is located below. You can consider the structural features of the body, color, powerful jaws of a predator.
What does the web look like?
The spider does not throw trapping nets in the form of a web, typical of many representatives of arachnids. Sak equips a bag of dense cobweb threads in which victims fall. A similar cocoon weaves after fertilization to lay eggs. Often the web blocks the entrance to the shelter. Engaged in web weaving predator at night, in the afternoon quietly sits in the chosen place.
Where dwells
The genus Heyrakantium includes 194 species. Representatives of the family inhabit almost all continents. The most vibrant species live in tropical countries. The settlement of the predator was facilitated by a warm climate, hot, long summers. In recent years, the yellow sak spider is often found in Russia. Lives in grass, forest litter, minks, under stones, as well as in gardens and kitchen gardens, and can make its way into a house.
Breeding
The female has a lifespan of 1 year. The mating season begins in mid-summer, by the end of the female lays eggs. For masonry, it initially forms a cocoon bag from its own web. At one time, the spider lays up to 600 eggs. The cubs develop for several weeks. The female holds the cocoon near her, provides a safe formation.
After the birth of the saka spider cubs for a long time live with their mother. Initially, she provides them with food, teaches to hunt. For the entire period of growing up, spiders pass up to 7 molts, each time increasing in size.
Interesting!
At the last stage, the genitals are formed, the body acquires a characteristic color. Adult heiracantiums eat the mother, they themselves begin to reproduce.
Food, spider lifestyle
Yellow golden sak leads a nocturnal lifestyle, hiding in secluded places during the day. Caterpillars become food for him, aphid, moth. The spider awaits them in the shelter, and then immediately jumps in a jump. With powerful jaws, the spider gnaws at the chitinous cover, injects poison.
The toxic substance acts on the nervous system, paralyzes the muscles of the insect. The predator introduces saliva into the wound, which dilutes the victim's insides to the state of the broth and leaves the prey for several minutes. After a while, the spider returns, sucks the insides, leaving only the chitinous cover from the insect. The same fate awaits an insect entangled in a web.
Poisonous or not sak
The yellow spider heiracantium possesses poisonous glands, injects a toxic substance into the victim’s wound. For humans, the dose of poison is extremely small, so there is no danger to life. A predator rarely attacks humans when they encroach on its own life. However, the probability of being bitten increases if the spider gets under the clothes or is accidentally crushed with a bare foot, hand.
After bite unpleasant symptoms appear:
- pain;
- burning;
- redness;
- edema;
- blisters;
- suppuration.
For days, the bite site hurts, burns. The next day, itching replaces painful sensations.
In people prone to allergies, with weakened immune systems, young children may develop general intoxication symptoms.
- headache;
- weakness;
- difficulty breathing
- vomiting
- abdominal pain;
- cardiopalmus;
- increase in blood pressure;
- change in body temperature.
Local symptoms disappear on their own after a few days, if there are signs of intoxication, you should consult a specialist. The likelihood of severe allergies increases if the spider bites repeatedly or there were several. There were no deaths after a bite of saka.
On a note!
If a heiracantium spider is found in the house, one should not make sudden movements, try to crush it. Arthropod jumps well, instantly bites with powerful jaws. Initially, you should cover the predator with a jar, a bucket, any capacity that fell into the arm. Gently cover with a sheet of paper, take it out to the street, shake off the container. If a decision is made to kill a predator, they spray it with any insecticide.
Benefit
Poison spider recognized as an active exterminator of crop pests. During the season, one small female eats more than 2 thousand caterpillars, adult moths, aphids. Especially no one puts yellow sacks on the territory, but if they appear, they are in no hurry to use insecticides. Spider man does little harm, people suffer through negligence. But the benefits to the environment are huge. Predators regulate the number of harmful insects that devour plants, crops, trees.
