Have you been bitten by a spider?
On November 7, Xiamen Customs intercepted a living Black Widow . Netizens seemed to be able to feel its toxicity along the network cable, and thanked the customs staff.
So, how poisonous is this black widow? Will being bitten by a black widow kill me?
Why is it called Black Widow?
Black Widow belongs to the family Spider family and the genus Spider family. David Nelson, associate professor of biology at South Adventist University, devoted his life to studying Black Widow Spider . He said the reason for choosing it as the subject is - "they are mysterious and dangerous."
is a classic wording for describing a femme fatale.
Source: MARK KOSTICH/GETTY IMAGES
According to the Britannia Encyclopedia, Black Widow is one of the most terrifying spiders in the world. The U.S. National Poisoning Data System receives about 2,600 reports of black widow bites every year.
But its name does not come from the ability to kill humans, but is really "murdering your own husband" and becoming a "widow" with your own strength.
Nilson said that " cannibalization " is not uncommon in the spider world, usually female spiders eat male spiders before, during or after mating. During mating, the adult male will weave a seminal vesicle that can store semen, then place the seminal vesicle on the tentacles of the whiskers and insert the tentacle ball into the fertilization vesicle of the spouse. Due to various complex evolutionary reasons, the female black widow who had this behavior turned around and killed the male spider who had just mate to obtain nutrients efficiently.
Not female is called black widow, male is called black widower...
Source: YouTube
In order not to be eaten, male black widows often run away quickly after mating. In addition, studies have shown that male black widow is able to sense chemicals in female spider webs, indicating whether she has eaten recently. They know to avoid hungry females just in case.
However, the male black widow does not have to worry that the child will not survive after death. The female black widow will weave a spherical silk container for the eggs and protect them before the eggs hatch.
is a mother, but not a mother, and how to recognize a black widow
0 Black widow usually weaves a net in a dark and dry place - under wooden piles, barns, greenhouses, basements, outhouses, toilets, lawns, furniture or playground facilities. They hide in tiny cracks or rodent holes during the day, and crawl on their own nets at night, hanging upside down, waiting for the flies and grasshoppers to be trapped by their sticky spider webs.
Black Widow Counterattack Hunter Spider
Source: YouTube
When the prey is stuck, the Black Widow quickly ran over and wrapped it with silk to make the food unable to move. Then use your fangs to stab the prey and inject the digestive fluid until it liquefies, and you can enjoy the insect juice.
Face the black widow without blindly facing the face
01
Female black widow can have 3.8 cm (calculate long legs). The males are about half the size of the females, and the smaller ones are probably just a few millimeters.
02
Female black widow has a bright black body, an iconic hourglass shape on her abdomen, or two separate dots, red, orange or yellow.
03
The males have lighter colors and have red or pink spots, but the changes in color and markings depend on the species. Slimmer than female legs.
Can black widow poison you
There are 32 species of spider genus, many of which are considered real widows. Except Antarctica, there are black widows on other continents.
Did you suddenly feel like you are surrounded by dangers when you see this? In fact, black widow spiders are usually not aggressive, they only bite when they are touched and trapped.
Don’t be obsessed with sister
If you find one, there is no need to pick up the insecticide immediately. They don't bother to pay attention to you at all. Black Widow plays an important role in our ecosystem, feeding on many insects, especially small and annoying insects like mosquitoes and flies.
Black Widow kills bumblebee, and fantasy linkage (?
is usually an accident when bitten. For example, if you don’t know why you scare it. Female is more ruthless in this regard - females are more likely to inject venom into humans than males.This venom is quite toxic, 15 times stronger than the venom of Rattlesnake .
But it is unlikely to be bitten to death. A study surveyed 23,409 cases of exposure to black widow venom and found that only 1.4% of patients had life-threatening symptoms, while 65% had mild symptoms. Toddlers, the elderly, and those with low immunity are at a higher risk of serious complications.
Although you probably don’t listen to it, many spiders are not dangerous to humans,
For example, Jin Zhima
Image source: MV "You Should See Me in a Crown"
How to judge that it was bitten by a black widow? First, if it is bitten by their little poisonous fangs, it feels like a needle prick. The second is that their venom contains toxins that act on nervous system . If they really enter the blood, the area around the wound will begin to swell, burn, and have a little spasm within a few seconds. The danger is that if the diaphragm is affected, breathing becomes difficult, the heart beats wildly, and even feels nauseous, sweating or chills.
For minor bites, all you need to do is wash the infected area with soap and water. And take over-the-counter painkillers. But if you have serious symptoms, go to the doctor. But don't scare yourself, you won't be in the hospital for long.
Source | howstuffworks
Translation | Zhao Zhiyu
Part of the picture | Tuchuang Creative
WeChat edit | Zhao Zhiyu
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