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Brown recluse

Loxosceles reclusa
Par nosaukumu: The scientific name reclusa means 'recluse', which refers to the spider's shy, hidden way of life.1
Vajag ārstuReti nāvējošs, bet kodums jārāda ārstam.
Zirnekļi KodumiĒd: Gaļa
Bīstamība cilvēkiem: NopietnsKodums jārāda ārstam. Nāves gadījumi ir ļoti reti.

The brown recluse is a small spider with a violin-shaped mark on its back. It lives mainly in the central and southern United States, where it hides in dark, quiet places such as woodpiles and sheds. It is one of only two North American spiders with dangerous venom, the other being the black widow.1

Dzīvo
Southern and central United States, from southeastern Nebraska south to central Texas and western Georgia1
Ziemeļamerika
Sākums
Brown recluses build irregular webs in dry, undisturbed places such as woodpiles, sheds, closets, garages, plenum spaces and cellars. In homes they seem to favour cardboard. People are usually bitten when the spider is trapped against the skin, for example inside clothes, shoes, towels, bedding or work gloves.1
Garums
6 mm līdz 2 cm (0,2 in līdz 0,8 in)1
Maksimālais ātrums
apmēram 0,8 km/h (0,5 jūdzes/h)
Uz sauszemes, aptuvens minējums
Ko tas ēd?
Brown recluses leave their lairs at night to hunt, unlike most web-weaving spiders. If food becomes scarce, they will occasionally, though not habitually, eat other brown recluses.1
Pa īstam!Brown recluse foto
Brown recluse. Foto: Rosa Pineda. CC BY-SA 3.0, Wikimedia Commons.

Kā to atpazīt

  • A dark violin-shaped marking on the top of the front body, with the neck of the violin pointing towards the rear of the spider1
  • Typically light to medium brown, though colours range from whitish to dark brown or blackish grey1
  • Six eyes arranged in three pairs, while most spiders have eight1
  • No obvious patterns on the abdomen or legs, and no spines on the legs1
  • Usually 6 to 20 millimetres in body length, but may grow larger1

Bieži jauc ar: The violin marking is not a reliable identifier, because cellar spiders and pirate spiders can have similar markings. The Mediterranean recluse, an introduced species, is almost indistinguishable from the brown recluse, so many reports of recluses are misidentifications. A spider in the genus Titiotus is the most common spider mistaken for a brown recluse in California, and its bite is considered harmless.1

Indes spēks

Kodumi

Inde iznāk caur ilkņiem vai zobiem, kad tas iekož.

Ko nodara tā inde?

The venom is necrotic, meaning it destroys tissue. It contains a dermonecrotic agent called sphingomyelinase D, which kills the skin around the bite. In some cases the venom spreads through the body within minutes, causing nausea, vomiting, fever, rashes and muscle and joint pain. Rarely, it can burst red blood cells (hemolysis).1

Cik bīstams tas ir cilvēkiem?

Bīstamība cilvēkiem: NopietnsKodums jārāda ārstam. Nāves gadījumi ir ļoti reti.

Most bites cause no skin damage, and the spider is rarely aggressive. In one clinical study, skin necrosis occurred in 37% of diagnosed bites and systemic illness in 14%. Rarely, bites can cause organ damage or death. Most fatalities have been in children under seven or in people with weak immune systems. Children, the elderly and seriously ill people may be more susceptible to systemic effects.1

Ko tas dara, kad ir nobijies?

When alarmed, it lowers its body, raises its pedipalps and stands still in a defensive pose. It usually flees, and if caught it may play dead.1

Ja tas iekož

  • Nomazgā kodumu un pret sāpēm uzliec ledus maisiņu. Meklē medicīnisko palīdzību, ja sāpes ir stipras, izplatās vai cilvēks jūtas slikti.

Vienmēr vispirms zvani uz savu ārkārtas numuru (112, 000, 911). Tie ir vispārīgi pirmās palīdzības padomi, nevis medicīniska konsultācija. Pirmās palīdzības pamati

Esi drošībā

  • Nekad neaiztiec, neķer un neķircini savvaļas dzīvnieku, pat mazu, un pat ja tas izskatās aizmidzis vai miris.
  • Dod tam vietu. Ja tādu satiec, saglabā mieru, lēnām atkāpies un ļauj tam iet savu ceļu.
  • Ja tāds tev iekož: saglabā mieru, nekusties, zvani uz savu ārkārtas numuru (112, 000, 911) vai ātri dodies uz slimnīcu. Atceries, kā tas izskatījās, foto palīdz.

Tas nav nolēmis tevi medīt. Tas izmanto indi, lai noķertu barību vai aizsargātos, un daudz labprātāk paslēptos. Vairāk par drošību

Cik tas ir liels?

Cik tas ir garš?

Brown recluse apmēram 2 cm garš (0,8 in)Rīsa grauds apmēram 7 mm (0,3 in)1 eiro monēta apmēram 2,3 cm (0,9 in)
apmēram tikpat garš kā saspraude

Cik liels ir Brown recluse salīdzinājumā ar TEVI?

Tikai matemātika tavā pārlūkā. Nekas netiek saglabāts vai kaut kur nosūtīts.

Cik tas ir ātrs?

vērts zināt

Fakti

1

One brown recluse survived for over five seasons in captivity without any food at all.1

2

In 2001, more than 2,000 brown recluses were removed from a heavily infested home in Kansas, yet the four residents who had lived there for years were never harmed.1

3

When a leg is lost, the brown recluse does not grow a new one in later moults, unlike the huntsman spider.1

4

Brown recluses do not balloon, which limits how far they can spread across the landscape.1

5

Males move around more when hunting than females, which tend to stay near their webs.1

Mītu grāvējs

Mīts: Brown recluses are common in California and the western United States, where they cause many bites.

Patiesība: The brown recluse has not established itself in California or anywhere outside its native range. Many reported bites there are misdiagnosed, and other spiders are often wrongly identified as brown recluses.1

Indes ekspertiem

Zinātniskais nosaukums
Loxosceles reclusa
Grupa
Zirnekļi
Ģimene
Sicariidae2
Secība
Araneae
Kontinenti
Ziemeļamerika
Mazuļi
Each female produces several egg sacs between May and July, with about 50 eggs in each sac. The eggs hatch in about one month, and the young take about a year to reach adulthood.1
Bīstamība cilvēkiem
3 / 5: Nopietns3

No kurienes nāk fakti

  1. Brown recluse spider (Wikipedia (CC BY-SA 4.0))
  2. Loxosceles reclusa (iNaturalist): nosaukumi un klasifikācija.
  3. Venom Wiki: bīstamības līmenis, tipiskais izmērs un ātruma minējums ir mūsu pašu. Paskaties, kā mēs tos aprēķinām: Kā mēs vērtējam bīstamību.

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