Venom Wiki / Todas las criaturas / Arañas

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Noble false widow

Steatoda nobilis

Sobre el nombre: It is called a false widow because it looks like the black widow spider, although it belongs to a different group of spiders.1

Solo dueleDuele, pero no te hará daño serio.

Arañas

MordedurasCome: Carne

Peligro para las personas: DolorosoPuede doler de verdad, pero casi nunca es 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

Longitud

7 mm a 1,4 cm (0,3 in a 0,6 in)1

Velocidad máxima

unos 0,86 km/h (0,53 mph)

En tierra, estimación aproximada

¿Qué 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

Foto de Noble false widow — Noble false widow. Foto: Dustin Edmundson. CC BY 4.0, iNaturalist.

Cómo reconocerlo

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

Se confunde a menudo 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 del veneno

Mordeduras

El veneno sale por sus colmillos o dientes cuando muerde.

¿Qué hace su veneno?

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

¿Qué peligro tiene para las personas?

Peligro para las personas: DolorosoPuede doler de verdad, pero casi nunca es 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

Si muerde

Without proper treatment, a bite wound can become infected and develop into gangrene or sepsis, so medical care should be sought.1
Lava la mordedura y ponle hielo para el dolor. Busca ayuda médica si el dolor es fuerte, se extiende o la persona se encuentra mal.

Llama siempre primero a tu número de emergencias (112, 000, 911). Esto son pautas generales de primeros auxilios, no consejo médico. Primeros auxilios básicos

Mantente a salvo

Nunca toques, atrapes ni molestes a un animal salvaje, aunque sea pequeño y aunque parezca dormido o muerto.
Déjale espacio. Si te encuentras uno, mantén la calma, retrocede despacio y deja que siga su camino.
Si te muerde: mantén la calma, no te muevas, llama a tu número de emergencias (112, 000, 911) o ve rápido a un hospital. Recuerda cómo era, una foto ayuda.

No va a por ti. Usa su veneno para cazar o defenderse, y prefiere mil veces esconderse. Más sobre cómo protegerte

¿En qué parte del mundo?

África Asia Europa Norteamérica Sudamérica Australia y Oceanía

¿Qué tamaño tiene?

¿Cuánto mide?

tan pequeño que cabe en tu uña

¿Qué tamaño tiene Noble false widow comparado contigo?

Solo cálculos en tu navegador. No se guarda ni se envía nada a ningún sitio.

¿Qué velocidad alcanza?

Una tortuga de tierra unos 0,3 km/h (0,19 mph)

Noble false widow unos 0,86 km/h (0,53 mph)

Una persona caminando unos 5 km/h (3,1 mph)

vale la pena saberlo

Datos

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

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

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

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

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

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

Cazamitos

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

Verdad: 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 veneno

Nombre científico: Steatoda nobilis
Grupo: Arañas
Familia: Theridiidae2
Orden: 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: unos 5 años1
Peligro para las personas: 2 / 5: Doloroso3

De dónde salen los datos

Steatoda nobilis (Wikipedia (CC BY-SA 4.0))
Steatoda nobilis (iNaturalist): nombres y clasificación.
Venom Wiki: el nivel de peligro, el tamaño típico y la velocidad estimada son nuestros. Mira cómo los calculamos: Cómo valoramos el peligro.

Cada dato de esta página tiene un número que lleva a su fuente. Si nos hemos equivocado en algo, perdón, somos fans de los animales, no una revista científica. Escríbenos a [email protected] y lo arreglamos.

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