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Noble false widow

Steatoda nobilis
Sobre o nome: It is called a false widow because it looks like the black widow spider, although it belongs to a different group of spiders.1
Só doeDoe, pero non che fará un dano grave.
Arañas MordeCome: Carne
Perigo para as persoas: DolorosoPode doer moito, pero case nunca é grave.

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

Vive en
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, África
Inicio
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
Lonxitude
7 mm a 1,4 cm (0,3 in a 0,6 in)1
Velocidade máxima
uns 0,86 km/h (0,53 mph)
En terra, estimación aproximada
Que come?
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 verdade!Foto de Noble false widow
Noble false widow. Foto: Dustin Edmundson. CC BY 4.0, iNaturalist.

Como recoñecelo

  • 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

Adoita confundirse con: 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 da pezoña

Morde

A pezoña sae polos seus cairos ou dentes cando morde.

Que fai a súa pezoña?

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

Que perigoso é para as persoas?

Perigo para as persoas: DolorosoPode doer moito, pero case nunca é grave.

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

Se morde

  • Without proper treatment, a bite wound can become infected and develop into gangrene or sepsis, so medical care should be sought.1
  • Lava a mordedura e ponlle unha bolsa de xeo para a dor. Busca axuda médica se a dor é forte, se se estende ou se a persoa se sente mal.

Chama sempre primeiro ao teu número de emerxencias (112, 000, 911). Isto son consellos xerais de primeiros auxilios, non consello médico. Primeiros auxilios básicos

Mantente a salvo

  • Nunca toques, collas nin molestes un animal salvaxe, aínda que sexa pequeno e aínda que pareza durmido ou morto.
  • Déixalle espazo. Se atopas un, mantén a calma, recúa amodo e déixao ir polo seu camiño.
  • Se un te morde: mantén a calma, non te movas, chama ao teu número de emerxencias (112, 000, 911) ou vai rápido a un hospital. Lembra como era, unha foto axuda.

Non vai a por ti. Usa a súa pezoña para cazar comida ou para defenderse, e prefire con moito agocharse. Máis sobre como estar a salvo

En que lugar do mundo?

ÁfricaAsiaEuropaAmérica do NorteAmérica do SurAustralia e Oceanía

Que tamaño ten?

Canto mide?

Noble false widow mide uns 1,4 cm (0,6 in)Un gran de arroz uns 7 mm (0,3 in)Unha moeda de 1 euro uns 2,3 cm (0,9 in)
tan pequeno que cabe na túa unlla

Que tamaño ten Noble false widow comparado CONTIGO?

Só son contas no teu navegador. Non se garda nin se envía nada a ningures.

Que rápido é?

paga a pena sabelo

Datos

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

Desmontamitos

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

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

Para expertos en pezoñas

Nome científico
Steatoda nobilis
Grupo
Arañas
Familia
Theridiidae2
Orde
Araneae
Continentes
Europa, África
Crías
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
Esperanza de vida
uns 5 anos1
Perigo para as persoas
2 / 5: Doloroso3

De onde veñen os datos

  1. Steatoda nobilis (Wikipedia (CC BY-SA 4.0))
  2. Steatoda nobilis (iNaturalist): nomes e clasificación.
  3. Venom Wiki: o nivel de perigo, o tamaño típico e a velocidade estimada son nosos. Mira como os calculamos: Como valoramos o perigo.

Cada dato desta páxina ten un número que leva á súa fonte. Se nos equivocamos nalgo, sentímolo, somos fans dos animais, non unha revista científica. Dínolo en [email protected] e arranxarémolo.

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