Redback spider
The redback spider is a highly venomous spider. It is thought to come from Australia, but it now also lives in Southeast Asia, Japan and New Zealand. It often lives close to people, in warm, sheltered places in and around homes, so it matters a great deal for safety.1

Com reconèixer-lo
- The adult female has a round, shiny black body with a red stripe on the top of the abdomen.1
- Underneath, she has an hourglass-shaped red or orange streak.1
- The female's body is about 1 cm long, with slender legs.1
- The male is much smaller, 3 to 4 mm long, light brown with white markings on the upper abdomen and a pale hourglass marking underneath.1
- Its web is an irregular, untidy tangle of strong silk, usually in a warm, sheltered spot.1
Sovint es confon amb: The false redback spider (Steatoda capensis) has a similar build but is uniformly black or plum-coloured, and it has no red stripe on its abdomen.1
Poder del verí
El verí surt pels ullals o les dents quan mossega.
Què fa el seu verí?
The venom is neurotoxic to vertebrates, meaning it attacks the nerves, and it causes a condition called latrodectism. Pain starts around the bite and typically becomes severe, spreading up the bitten limb and lasting for over 24 hours. Localised sweating in patches of skin is highly indicative of latrodectism, and nausea, vomiting, headache and agitation may indicate severe envenomation.1
Com de perillós és per a les persones?
Perill per a les persones: GreuUna mossegada necessita un metge. Les morts són molt rares.The redback is one of the few spider species that can seriously harm humans. Because it often lives in buildings, it is responsible for a large number of serious spider bites in Australia.1
Bona notícia: els metges tenen un medicament (l'antiverí) o un tractament per a això.1
Què fa quan té por?
Its bright scarlet markings may serve as a warning to potential predators.1
Si mossega
- 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
Que gran és?
Quant fa de llarg?
tan petit que cap a la teva unglaQue gran és Redback spider comparat amb TU?
Només càlculs al teu navegador. No es desa ni s'envia res enlloc.
Com de ràpid va?
Dades
A male redback can successfully mate with a female katipō, a related New Zealand spider, producing hybrid offspring.1
Males often mate with a female who may then eat them, a behaviour called sexual cannibalism that many arachnids show while mating.1
In laboratory tests, redbacks survived an average of 100 days, and sometimes over 300 days, without food.1
After mating, a female can store sperm for up to two years and use it to fertilise several clutches of eggs.1
Spiderlings and larger females steal food from other spiders' webs, and spiderlings sometimes eat their less active siblings.1
Per a experts en verins
- Nom científic
- Latrodectus hasselti
- Grup
- Aranyes
- Família
- Theridiidae2
- Ordre
- Araneae
- Continents
- Austràlia i Oceania
- Cries
- Each clutch averages 250 eggs, housed in a round white silken egg sac. Spiderlings hatch after about 8 days, though cooler temperatures can greatly slow this.1
- Esperança de vida
- uns 3 anys1
- Perill per a les persones
- 3 / 5: Greu3
D'on surten les dades
- Redback spider (Wikipedia (CC BY-SA 4.0))
- Latrodectus hasselti (iNaturalist): noms i classificació.
- 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.
Mossegades
