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Southern black widow

Latrodectus mactans

Dovra in mediDarar mortal, ma ina morsa sto vegnir tractada dad in medi.

Filiens

MorsasMangia: Charn

Privel per umans: GravIna morsa sto vegnir tractada dad in medi. Cas da mort èn fitg rars.

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

Viva en

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

America dal Nord

Pagina iniziala

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

Lunghezza

8 mm fin 1,3 cm (0,3 in fin 0,5 in)1

Sveltezza maximala

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

Sin terra, stima approximativa

Tge mangia el?

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

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

Co renconuscher el

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

Savens confundì cun: 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

Forza dal tissi

Morsas

Il tissi vegn or tras ses dents da tissi u ses dents, cura ch'el morda.

Tge fa ses tissi?

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

Quant privlus è el per umans?

Privel per umans: GravIna morsa sto vegnir tractada dad in medi. Cas da mort èn fitg rars.

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

Bunas novitads: ils medis han in medicament (antiserum) u in tractament per quai.1

Sch'el morda

Lava la morsa e metta in pachet da glatsch sin ella cunter las dolurs. Tschertga agid medicinal, sche las dolurs èn fermas, sa derasan u sche la persuna na sa senta betg bain.

Clama adina l'emprim tes numer d'urgenza (112, 000, 911). Quai è in cussegl general d'emprim agid, betg in cussegl medicinal. Basa da l'emprim agid

Resta en segirezza

Na tutga, na piglia e na tizza mai in animal selvadi, gnanc in pitschen, ed era sch'el para da durmir u d'esser mort.
Dà spazi a l'animal. Sche ti scuntras in, resta calm, va plaun enavos e lascha ir el per sia via.
Sch'in tal animal ta morda: resta calm, na ta mova betg, clama tes numer d'urgenza (112, 000, 911) u va spert en in ospital. Ta regorda co ch'el veseva or, ina foto gida.

El n'ha betg quai sin tai. El dovra ses tissi per pigliar nutriment u per sa defender, e sa zuppa bler pli gugent. Dapli davart la segirezza

Nua sin il mund?

Africa Asia Europa America dal Nord America dal Sid Australia ed Oceania

Quant grond è el?

Quant lung è el?

uschè pitschen ch'el po seser sin tia ungla

Quant grond è Southern black widow cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn memorisà u tramess.

Quant svelt è el?

Ina tartaruga circa 0,3 km/h (0,19 mph)

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

Ina persuna che va a pe circa 5 km/h (3,1 mph)

bun da savair

Fatgs

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

Destructur da mits

Mit: A black widow bite is usually fatal.

Vardad: 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

Per experts da tissi

Num scientific: Latrodectus mactans
Gruppa: Filiens
Famiglia: Theridiidae2
Urden: Araneae
Continents: America dal Nord
Poppins: 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
Durada da vita: circa 3 onns1
Privel per umans: 3 / 5: Grav3

Da nua che vegnan ils fatgs

Latrodectus mactans (Wikipedia (CC BY-SA 4.0))
Latrodectus mactans (iNaturalist): nums e classificaziun.
Venom Wiki: il stgalim da privel, la grondezza tipica e la stima da la sveltezza èn noss agens. Guarda co che nus als calculain: Co che nus valitain il privel.

Mintga fatg sin questa pagina ha in numer che renvia a sia funtauna. Sche nus avain fatg in sbagl, perstgisa, nus essan fans d'animals, betg ina revista scientifica. Scriva a nus a [email protected] e nus curregin.

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