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Southern black widow

Latrodectus mactans

Shifokor kerakKamdan-kam halokatli, lekin chaqqanda shifokor kerak.

Oʻrgimchaklar

ChaqadiOvqati: Goʻsht

Odamlar uchun xavf: JiddiyChaqqanda shifokor kerak. Oʻlim holatlari juda kam.

The southern black widow is a venomous spider that lives in North America. Mature females are shiny black with a red hourglass mark on their underside. Its bite can cause pain and other symptoms, but it is rarely fatal to healthy people.1

Yashash joyi

Native to North America, mainly the southeastern United States. Also found in Mexico and the Dominican Republic, and established in Hawaii (USA).1

Shimoliy Amerika

Bosh sahifa

It builds tangled, three-dimensional cobwebs and waits in a retreat near them. One way it has reached Hawaii is through imported produce.1

Uzunlik

8 mm dan 1,3 cm gacha (0,3 in dan 0,5 in gacha)1

Eng yuqori tezlik

taxminan 0,98 km/soat (0,61 mil/soat)

Quruqlikda, taxminiy

Nima yeydi?

It eats a variety of insects, and also woodlice, millipedes, centipedes and other spiders. When prey is caught in its web, it rushes out, wraps the prey tightly in silk, and bites it. It then releases digestive enzymes into the wound and carries the prey back to its retreat to feed.1

Southern black widow surati — Southern black widow. Surat: unknown. CC BY 2.0, Wikimedia Commons.

Uni qanday tanish mumkin

Mature females are shiny black, with a red hourglass-shaped mark on the underside of a very rounded abdomen.1
Many females have an orange or red patch on the top of the abdomen, just above the spinnerets.1
Mature females have a body length of 8–13 mm, not counting the legs. Males are 3–6 mm.1
Juveniles look very different. They have a grey to black abdomen with white stripes across it, spotted with yellow and orange.1
Males are either purple, or look more like the juveniles.1

Koʻpincha adashtiriladi: It is often confused with the false widows (genus Steatoda) and with the closely related northern (L. variolus) and western (L. hesperus) black widows.1

Zahar quvvati

Chaqadi

Chaqqanda zahar zaharli tishlari yoki tishlari orqali chiqadi.

Uning zahari (chaqsa yoki nish ursa) nima qiladi?

The venom contains alpha-latrotoxin, a neurotoxic venom that attacks the nerves. It causes pain and other symptoms, which are collectively called latrodectism.1

Odamlar uchun qanchalik xavfli?

Odamlar uchun xavf: JiddiyChaqqanda shifokor kerak. Oʻlim holatlari juda kam.

Deaths in healthy adults are exceedingly rare. No deaths were reported among 23,409 documented Latrodectus bites in the US from 2000 to 2008, though about 2,000 bites happen each year. Only mature females can bite people.1

Yaxshi xabar: shifokorlarda buning uchun dori (zaharga qarshi zardob) yoki davolash usuli bor.1

Agar chaqsa

Chaqilgan joyni yuv va ogʻriq uchun ustiga muz xaltasi qoʻy. Agar ogʻriq kuchli boʻlsa, tarqalsa yoki odam oʻzini yomon his qilsa, tibbiy yordam ol.

Har doim avval favqulodda yordam raqamiga qoʻngʻiroq qil (112, 000, 911). Bu birinchi yordam boʻyicha umumiy maslahat, tibbiy maslahat emas. Birinchi yordam asoslari

Xavfsiz boʻl

Hech qachon yovvoyi hayvonga tegma, uni tutma yoki jigʻiga tegma, hatto kichkina boʻlsa ham va hatto uxlayotgan yoki oʻlik koʻrinsa ham.
Unga joy ber. Agar duch kelsang, xotirjam boʻl, sekin orqaga chekin va uni oʻz yoʻliga ketishiga qoʻy.
Agar biri seni chaqsa: xotirjam boʻl, qimirlamay tur, favqulodda yordam raqamiga qoʻngʻiroq qil (112, 000, 911) yoki tezda kasalxonaga yet. U qanday koʻrinishda ekanini eslab qol, surat yordam beradi.

U seni ovlamoqchi emas. Zaharini ovqat tutish yoki oʻzini himoya qilish uchun ishlatadi va yashirinishni ancha afzal koʻradi. Xavfsiz qolish haqida batafsil

Dunyoning qayerida?

Afrika Osiyo Yevropa Shimoliy Amerika Janubiy Amerika Avstraliya va Okeaniya

U qanchalik katta?

U qanchalik uzun?

tirnogʻing ustiga sigʻadigan darajada kichik

Southern black widow SEN bilan solishtirganda qanchalik katta?

Faqat brauzeringdagi hisob-kitob. Hech narsa saqlanmaydi va hech qayerga yuborilmaydi.

U qanchalik tez?

Toshbaqa taxminan 0,3 km/soat (0,19 mph)

Southern black widow taxminan 0,98 km/soat (0,61 mph)

Piyoda ketayotgan odam taxminan 5 km/soat (3,1 mph)

bilish foydali

Faktlar

In 1933, Allan Blair let himself be bitten by one of these spiders to study its venom in humans and to convince sceptics that it could be dangerous.1

Females will occasionally eat their mates after reproduction.1

Only mature females can bite people. Their hollow, needle-like mouthparts are about 1 mm long, which is long enough to inject venom into people.1

The brown widow (Latrodectus geometricus) competes with black widows for territory. In areas where they share space, it can displace them.1

Males live only about three to four months, while females can live for up to three years.1

Afsonalarni fosh qiluvchi

Afsona: A black widow bite is usually fatal.

Haqiqat: Black widow bites are rarely fatal to healthy people. No deaths from the US species were reported among 23,409 documented bites from 2000 to 2008.1

Zahar mutaxassislari uchun

Ilmiy nomi: Latrodectus mactans
Guruh: Oʻrgimchaklar
Oila: Theridiidae2
Tartib: Araneae
Qitʼalar: Shimoliy Amerika
Chaqaloqlar: A female can produce four to nine egg sacs in one summer, each holding about 100–400 eggs, which she guards in a silken container.1
Umr davomiyligi: taxminan 3 yil1
Odamlar uchun xavf: 3 / 5: Jiddiy3

Faktlar qayerdan olingan

Latrodectus mactans (Wikipedia (CC BY-SA 4.0))
Latrodectus mactans (iNaturalist): nomlar va tasnif.
Venom Wiki: xavf darajasi, odatiy oʻlcham va taxminiy tezlik bizning oʻz baholarimiz. Ularni qanday hisoblashimizni koʻr: Xavfni qanday baholaymiz.

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