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Southern black widow

Latrodectus mactans

Medikua behar duGutxitan da hilgarria, baina koska batek medikua behar du.

KoskaJaten du: Haragia

Arriskua pertsonentzat: LarriaKoska batek medikua behar du. Heriotzak oso arraroak dira.

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

Non bizi den

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

Ipar Amerika

Hasiera

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

Luzera

8 mm eta 1,3 cm artean (0,3 in eta 0,5 in artean)1

Abiadura handiena

0,98 km/h inguru (0,61 mph)

Lehorrean, kalkulu gutxi gorabeherakoa

Zer jaten du?

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

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

Nola ezagutu

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

Askotan honekin nahasten da: 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

Pozoi-ahalmena

Koska

Pozoia letaginetatik edo hortzetatik ateratzen da kosk egiten duenean.

Zer egiten du bere pozoiak?

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

Zein arriskutsua da pertsonentzat?

Arriskua pertsonentzat: LarriaKoska batek medikua behar du. Heriotzak oso arraroak dira.

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

Albiste ona: medikuek badute sendagai bat (antipozoia) edo tratamendu bat honetarako.1

Kosk egiten badu

Garbitu koska eta jarri izotz-poltsa bat gainean minerako. Lortu mediku-laguntza mina handia bada, zabaltzen bada edo pertsona gaizki sentitzen bada.

Deitu beti lehenik zure larrialdi-zenbakira (112, 000, 911). Lehen sorospenei buruzko orientabide orokorra da hau, ez mediku-aholkua. Lehen sorospenen oinarriak

Egon seguru

Ez ukitu, ez harrapatu eta ez zirikatu inoiz animalia basati bat, txikia izan arren, eta lo edo hilda dagoela badirudi ere.
Utzi tartea. Bat aurkitzen baduzu, egon lasai, egin atzera poliki eta utzi bere bidetik joaten.
Batek kosk egiten badizu: egon lasai, egon geldi, deitu zure larrialdi-zenbakira (112, 000, 911) edo joan ospitalera azkar. Gogoratu nolakoa zen, argazki batek laguntzen du.

Ez dabil zure atzetik. Pozoia janaria harrapatzeko edo bere burua babesteko erabiltzen du, eta askoz nahiago du ezkutatu. Seguru egoteari buruz gehiago

Munduko zein tokitan?

Afrika Asia Europa Ipar Amerika Hego Amerika Australia eta Ozeania

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zure azazkalaren gainean esertzeko bezain txikia

Zein handia da Southern black widow ZUREKIN alderatuta?

Matematika hutsa zure nabigatzailean. Ez da ezer gordetzen, ezta inora bidaltzen ere.

Zein azkarra da?

Dortoka bat 0,3 km/h inguru (0,19 mph)

Southern black widow 0,98 km/h inguru (0,61 mph)

Oinez doan pertsona bat 5 km/h inguru (3,1 mph)

jakin beharrekoa

Datuak

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

Mito-hauslea

Mitoa: A black widow bite is usually fatal.

Egia: 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

Pozoi-adituentzat

Izen zientifikoa: Latrodectus mactans
Taldea: Armiarmak
Familia: Theridiidae2
Ordena: Araneae
Kontinenteak: Ipar Amerika
Kumeak: 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
Bizi-iraupena: 3 urte inguru1
Arriskua pertsonentzat: 3 / 5: Larria3

Datuak nondik datozen

Latrodectus mactans (Wikipedia (CC BY-SA 4.0))
Latrodectus mactans (iNaturalist): izenak eta sailkapena.
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