Spiders - a special class of living creatures, which was named after a girl of Greek mythology.In the myth of the weaver named Arachne who dared to call the match in skill Athena, says that the goddess of victory, not recognizing the effort simple girl.From resentment and frustration Arachne wanted to hang himself.However, Athena, she was turned into a spider, tirelessly weaving its network.
And Now they should take a closer look some of the characteristics of arthropods.What are the features of the structure and behavior of the spider Araneus help these beings survive?
special life
spiders Araneus Spider (photo proves) is a typical representative of its class.To the order of arachnids are also mites and scorpions.More than 300 000 species of this class lives in tropical and mixed forests of our planet.To find out what features of the structure and behavior of the spider Araneus there, you have to be very attentive observer.Most often he "weaver" is invisible to us.But it is quite noticeable cobwebs!
Behavior spider Araneus due to its way of life and habitat.The forests, parks, gardens and various green spaces - all of which can be a home for representatives of this species.In human dwellings also quite often found Araneus diadematusa.
appearances spider Araneus
Taurus All spiders are similar:
- small cephalothorax;
- large egg-shaped abdomen;
- 8 feet.
By drawing on the surface of the back, similar to the cross, this type gets its name.The so-called eyes (8 paired units) located in front of the cephalothorax spider.Roth Araneus consists of several "components": a pair of jaws, claws with poisonous glands on the grounds, as well as nogoschupaltsy (chelicerae) - organs of touch.
avilable spider Araneus allow it to survive attack and eat with the help of their powerful jaws.The feet are arranged comb claws that "forest weaver" creates its sticky web.Spinneret located at the bottom of the abdomen.Despite the presence of so many eyes, spider family sees very badly.The main assistant to the survival of a touch sensitive using the legs.
Catering Araneus
Builder and hunter spider Araneus eats everything that falls into his trap.It can be horseflies and flies, mosquitoes and gnats and various small insects.All members of this type - predators, including Araneus.Photography helps us to see the process of catching insects in the sticky web of a network.Nogoshupaltsami grabbing prey, with their jaws, hooks, spider bites through it, injecting a paralyzing venom into the wound of the victim.At the same time his body and enters the digestive juice, softening the interior of the flies.
With his irrepressible appetite for the hunter is able to suck the insects at a time more than a dozen flies.If the victim is too many behavioral characteristics of spider Araneus told him wrapped in a cocoon of captives and leave "for later".Stocks to trap suspended on strings.Spiders are not adapted to eating solid food.But they can suck out the insides softened insects.For such extra-intestinal feeding mode arachnids do not need stomach.
How to breed spiders
only by the end of year period, eight-legged forest dwellers reach puberty.Watching some features of the structure and behavior of the spider Araneus contribute to the reproduction of this species, biologists have found that females are larger than males more than doubled.Living alone, only to fall the spider is sent to look for a "lady."Is attached to a female trapped in the thread and pulling it, he was so drawn to the attention of a female.What happened pairing becomes the last event in the life of the male - "lady" eats it after the process of fertilization.Instinct saturation, nothing personal!
female spider lays eggs in the autumn months, wrapping laying dense cocoon filament.With this silk protect the future offspring easily outlast any frost.Suspended in secluded places, in the crevices of tree bark, the pods will open next spring.Small spiders, wintered, come to build their traps.
What makes a spider spin a web
Without his graceful predator traps this would not be a spider.Let's look at what features of the structure and behavior of the spider Araneus forced him to weave a network of life and nutrition.
- Hunger - the root cause of all the actions of representatives of the species.To have a meal, you need to find a place suitable for the trap.
- When arthropod determined with the territory, included the following instinct - spider starts to separate structure.
- Every action causes a subsequent signals about the need to continue.Everything is arranged simply and clearly.
skills spider weaving trapping network may be innate, built into the genetic code, or acquired, depending on the living environment.However, the general scheme of the web always has many of the same parts.Ideal woven spiral coils mounted on the radius of the network with equal angles.The center of gravity is always coincides with the center of the web of the grid.
About spiders, cobwebs and human
Remembering signs and research, you can find out what features and behaviors spider Araneus used by humankind for the treatment of various diseases.
- With a fresh shot cobweb to a small wound can stop the bleeding.
- believed that decoration depicting forest vosminozhki brings money luck.
- European physicians of the Middle Ages argued that wearing the pendant on his chest in the form of a spider protect against disease.
- If the "handsome" sits in the heart of his traps and crawls out, be sure to rain.
- If spiders weave a fresh network, it is for sunny weather.
In conclusion, the benefits of the order of arachnids
If not for this family, humanity could carry big annual losses
crop losses.Spiders played almost the leading role in the fight against pests.For the season on a hectare of forest area destroyed by these gluttons more than 200 kg of various potential carriers of infectious diseases.
Viva spider Araneus!
