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Dibuix de Noble false widow
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Noble false widow

Steatoda nobilis
Sobre el nom: It is called a false widow because it looks like the black widow spider, although it belongs to a different group of spiders.1
Només fa malFa mal, però no et farà cap mal greu.
Aranyes MossegadesMenja: Carn
Perill per a les persones: DolorósPot fer molt de mal, però gairebé mai no és greu.

The noble false widow is a spider that looks a lot like the black widow, which is why it has its name. It is now found in many parts of the world, including Europe, the United States and New Zealand, and it is one of the world's most invasive spiders. Its bite can be painful, so it is worth knowing what it looks like.1

Viu a
Native to Madeira and the Canary Islands. Now established across Europe, parts of the USA, North Africa, Chile, Colombia, Ecuador and New Zealand.1
Europa, Àfrica
Inici
It lives both indoors and outdoors all year round, in places such as cacti, agave, roadside cuttings, demolished buildings, telegraph poles, concrete fence posts and ivy on walls. Seaside cities and villages with a mild climate are especially good places for it.1
Llargada
de 7 mm a 1,4 cm (de 0,3 in a 0,6 in)1
Velocitat màxima
uns 0,86 km/h (0,53 mph)
A terra, estimació aproximada
Què menja?
It eats both insects and other spiders, woodlice, and small vertebrates such as pipistrelle bats and a pygmy shrew. It catches prey with an 'attack wrap', wrapping silk around the victim while it bites, and its venom quickly paralyses the prey.1
De debò!Foto de Noble false widow
Noble false widow. Foto: Dustin Edmundson. CC BY 4.0, iNaturalist.

Com reconèixer-lo

  • The abdomen (rear body) is brown and rounded, with cream markings that are often said to look like a skull.1
  • The legs are reddish-orange.1
  • Adult females are about 9.5 to 14 mm in size, and males are about 7 to 11 mm.1
  • It is larger than other spiders in its genus, Steatoda, and has a typical colour pattern.1

Sovint es confon amb: It is often mistaken for the black widow (Latrodectus) and other false widow species. It can be told apart from the black widow by its larger size within its genus and its typical colouring, though many spiders in this group look similar.1

Poder del verí

Mossegades

El verí surt pels ullals o les dents quan mossega.

Què fa el seu verí?

Most of its venom is made of toxins similar to those of the widow spiders, mainly alpha-latrotoxin. This toxin makes holes in nerve cells, which releases chemical messengers and blocks the signals between nerves and muscles, causing paralysis. In people, the venom is most noticeable as pain at the bite site, along with swelling, redness and fever.1

Com de perillós és per a les persones?

Perill per a les persones: DolorósPot fer molt de mal, però gairebé mai no és greu.

It is considered moderately medically significant. Most bites cause symptoms similar to a bee or wasp sting, but some can be more serious, partly because of bacteria. It is considered one of the most dangerous spiders in western Europe. Bites from males are less severe than bites from females, and the bite itself is usually painless, with pain coming from the venom.1

Si mossega

  • Without proper treatment, a bite wound can become infected and develop into gangrene or sepsis, so medical care should be sought.1
  • Renta la mossegada i posa-hi gel per al dolor. Busca ajuda mèdica si el dolor és fort, s'estén o la persona es troba malament.

Truca sempre primer al número d'emergències (112, 000, 911). Això són pautes generals de primers auxilis, no consells mèdics. Primers auxilis bàsics

Estigues segur

  • No toquis, atrapis ni molestis mai un animal salvatge, encara que sigui petit i encara que sembli adormit o mort.
  • Deixa-li espai. Si en trobes un, mantén la calma, recula a poc a poc i deixa que segueixi el seu camí.
  • Si te'n mossega un: mantén la calma, no et moguis, truca al número d'emergències (112, 000, 911) o ves de pressa a un hospital. Recorda com era, una foto ajuda.

No va a per tu. Fa servir el verí per caçar o per defensar-se, i prefereix mil vegades amagar-se. Més sobre com estar segur

On del món?

ÀfricaÀsiaEuropaAmèrica del NordAmèrica del SudAustràlia i Oceania

Que gran és?

Quant fa de llarg?

Noble false widow uns 1,4 cm de llarg (0,6 in)Un gra d'arròs uns 7 mm (0,3 in)Una moneda d'1 euro uns 2,3 cm (0,9 in)
tan petit que cap a la teva ungla

Que gran és Noble false widow comparat amb TU?

Només càlculs al teu navegador. No es desa ni s'envia res enlloc.

Com de ràpid va?

val la pena saber-ho

Dades

1

The spider often catches prey much larger than itself, including bats, because its venom works quickly.1

2

It can survive without drinking water, getting all its liquid from its prey.1

3

Males court females by tapping the web and vibrating their bodies, and they can make scraping sounds with their abdomens.1

4

It has poor eyesight and relies mainly on vibrations travelling through its web.1

5

It produces three-dimensional cobwebs, and its silk is unusually strong for its genus.1

6

One adult female lived almost five and a half years in captivity, and adult females are long-lived.1

Desmuntamites

Mite: It is the same spider as the black widow.

Veritat: It only looks similar to the black widow. It belongs to the genus Steatoda, while the black widow belongs to the genus Latrodectus.1

Per a experts en verins

Nom científic
Steatoda nobilis
Grup
Aranyes
Família
Theridiidae2
Ordre
Araneae
Continents
Europa, Àfrica
Cries
Females make egg sacs containing an average of 94 eggs, with a range of 34 to 208 eggs. The young hatch inside the egg sac about 18 days after the eggs are laid.1
Esperança de vida
uns 5 anys1
Perill per a les persones
2 / 5: Dolorós3

D'on surten les dades

  1. Steatoda nobilis (Wikipedia (CC BY-SA 4.0))
  2. Steatoda nobilis (iNaturalist): noms i classificació.
  3. Venom Wiki: el nivell de perill, la mida típica i la velocitat estimada són nostres. Mira com els calculem: Com valorem el perill.

Cada dada d'aquesta pàgina té un número que porta a la seva font. Si ens hem equivocat en alguna cosa, perdona, som fans dels animals, no una revista científica. Escriu-nos a [email protected] i ho arreglarem.

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També viu a: Europa

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