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Noble false widow

Steatoda nobilis

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

Gør bare ondtDet gør ondt, men det skader dig ikke alvorligt.

Edderkopper

BidSpiser: Kød

Fare for mennesker: SmertefuldDet kan gøre rigtig ondt, men det er næsten aldrig alvorligt.

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

Lever i

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, Afrika

Forside

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

Længde

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

Tophastighed

cirka 0,86 km/t (0,53 mph)

På land, groft gæt

Hvad spiser det?

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

Sådan genkender du det

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

Forveksles ofte med: 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

Giftkraft

Bid

Giften kommer ud gennem gifttænderne eller tænderne, når det bider.

Hvad gør dets gift, når det bider eller stikker?

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

Hvor farligt er det for mennesker?

Fare for mennesker: SmertefuldDet kan gøre rigtig ondt, men det er næsten aldrig alvorligt.

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

Hvis det bider

Without proper treatment, a bite wound can become infected and develop into gangrene or sepsis, so medical care should be sought.1
Vask biddet, og læg en ispose på mod smerterne. Få lægehjælp, hvis smerterne er stærke, breder sig, eller personen har det dårligt.

Ring altid først til dit alarmnummer (112, 000, 911). Dette er generel førstehjælpsvejledning, ikke lægelig rådgivning. Grundlæggende førstehjælp

Pas på dig selv

Rør aldrig ved, fang eller dril et vildt dyr, heller ikke et lille et, og heller ikke hvis det ser ud til at sove eller være dødt.
Giv det plads. Hvis du møder et, så bliv rolig, træd langsomt tilbage, og lad det gå sin egen vej.
Hvis et bider dig: Bevar roen, hold dig i ro, ring til dit alarmnummer (112, 000, 911), eller kom hurtigt på hospitalet. Husk, hvordan det så ud, et billede hjælper.

Det er ikke ude efter dig. Det bruger sin gift til at fange føde eller beskytte sig selv, og det gemmer sig meget hellere. Mere om sikkerhed

Hvor i verden?

Afrika Asien Europa Nordamerika Sydamerika Australien & Oceanien

Hvor stort er det?

Hvor langt er det?

lille nok til at sidde på din fingernegl

Hvor stor er Noble false widow i forhold til DIG?

Bare matematik i din browser. Intet bliver gemt eller sendt nogen steder hen.

Hvor hurtigt er det?

En skildpadde cirka 0,3 km/t (0,19 mph)

Noble false widow cirka 0,86 km/t (0,53 mph)

Et menneske, der går cirka 5 km/t (3,1 mph)

værd at vide

Fakta

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

Myteknuser

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

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

For gifteksperter

Videnskabeligt navn: Steatoda nobilis
Gruppe: Edderkopper
Familie: Theridiidae2
Orden: Araneae
Kontinenter: Europa, Afrika
Unger: 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
Levetid: cirka 5 år1
Fare for mennesker: 2 / 5: Smertefuld3

Hvor fakta kommer fra

Steatoda nobilis (Wikipedia (CC BY-SA 4.0))
Steatoda nobilis (iNaturalist): navne og klassifikation.
Venom Wiki: fareniveauet, den typiske størrelse og hastighedsgættet er vores egne. Se, hvordan vi regner dem ud: Sådan vurderer vi faren.

Hvert faktum på denne side har et nummer, der peger på kilden. Hvis vi har taget fejl, så undskyld, vi er dyrefans, ikke et videnskabeligt tidsskrift. Skriv til os på [email protected], så retter vi det.

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