Nọmba 0634 n'ime 1 402

Redback spider

Latrodectus hasselti

Gbasara aha ya: It is called the redback because of the distinctive red stripe along the top of its abdomen.1

Ọ chọrọ dọkịtaỌ naghị egbukarị egbu, mana ịta ya chọrọ dọkịta.

Ududo

ỊtaNri ya: Anụ

Ihe ize ndụ nye mmadụ: Ọ dị njọỊta ya chọrọ dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

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

Ebe obibi

Australia, Southeast Asia, Japan and New Zealand; established colonies also in the United Arab Emirates1

Ọstrelia na Oshenia

Ụlọ

It lives in warm, sheltered places, commonly near or inside human homes and other buildings. Food scraps and lights attract the insects it hunts, which brings the redback closer to people.1

Ogologo

1 cm (0.4 in)1

Ọsọ kacha elu

ihe dị ka 0.92 km/h (0.57 mph)

N'elu ala, nchepụta

Gịnị ka ọ na-eri?

It mainly catches insects, but also spiders, small lizards and occasionally even snakes or a mouse that become caught in its web. It squirts sticky silk over the prey, bites it repeatedly, wraps it in silk, then sucks out its liquefied insides back at its retreat.1

Foto Redback spider — Redback spider. Foto: Paul Whitington. CC BY 4.0, iNaturalist.

Otú ị ga-esi mata ya

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

A na-agwakọkarị ya na: 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

Ike nsị

Ịta

Nsị na-esi n'eze nsị ya ma ọ bụ eze ya apụta mgbe ọ na-ata.

Gịnị ka nsị ọ na-agba na-eme?

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

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: Ọ dị njọỊta ya chọrọ dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

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

Ozi ọma: ndị dọkịta nwere ọgwụ (antivenom) ma ọ bụ ọgwụgwọ maka nke a.1

Gịnị ka ọ na-eme mgbe ụjọ tụrụ ya?

Its bright scarlet markings may serve as a warning to potential predators.1

Ọ bụrụ na ọ tara

Saa ebe ọ tara, tinye akpa ice n'elu ya maka mgbu ahụ. Chọọ enyemaka ọgwụ ma ọ bụrụ na mgbu ahụ siri ike, gbasaa, ma ọ bụ na ahụ adịghị onye ahụ mma.

Na-ebu ụzọ kpọọ nọmba mberede gị mgbe niile (112, 000, 911). Nke a bụ ndụmọdụ enyemaka mbụ n'ozuzu, ọ bụghị ndụmọdụ ọgwụ. Isi ihe enyemaka mbụ

Nọrọ na nchekwa

Emetụla anụ ọhịa aka, ejidela ya, emekwala ya ihe ọjọọ, ọbụna obere, ọbụna ma ọ dị ka ọ na-ehi ụra ma ọ bụ nwụọ anwụ.
Nye ya ohere. Ọ bụrụ na ị zutere otu, dị jụụ, laghachi azụ nwayọ, hapụ ya ka ọ gaa ụzọ ya.
Ọ bụrụ na otu tara gị: dị jụụ, emegharịla ahụ, kpọọ nọmba mberede gị (112, 000, 911) ma ọ bụ gaa ụlọ ọgwụ ngwa ngwa. Cheta ka o si dị, foto na-enye aka.

Ọ naghị achụ gị. Ọ na-eji nsị ya ejide nri ma ọ bụ chebe onwe ya, ọ ga-akakwa mma n'anya ya ịzo onwe ya. Ihe ndị ọzọ gbasara ịnọ na nchekwa

Ebee n'ụwa?

Afrịka Eshia Yurop Ugwu Amerika Ndịda Amerika Ọstrelia na Oshenia

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

dị obere nke na ọ nwere ike ịnọdụ n'elu mbọ aka gị

Kedu otú Redback spider si hà ma e jiri ya tụnyere GỊ?

Naanị mgbakọ na mwepụ n'ime browser gị. Ọ dịghị ihe echekwara ma ọ bụ ezigara ebe ọ bụla.

Kedu otú o si agba ọsọ?

Mbe ihe dị ka 0.3 km/h (0.19 mph)

Redback spider ihe dị ka 0.92 km/h (0.57 mph)

Mmadụ na-aga ije ihe dị ka 5 km/h (3.1 mph)

ọ dị mma ịmara

Eziokwu

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

Maka ndị ọkachamara nsị

Aha sayensị: Latrodectus hasselti
Otu: Ududo
Ezinụlọ: Theridiidae2
Usoro: Araneae
Kọntinent dị iche iche: Ọstrelia na Oshenia
Ụmụ ọhụrụ: 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
Ogologo ndụ: ihe dị ka afọ 31
Ihe ize ndụ nye mmadụ: 3 / 5: Ọ dị njọ3

Ebe eziokwu ndị a si

Redback spider (Wikipedia (CC BY-SA 4.0))
Latrodectus hasselti (iNaturalist): aha na nhazi ọkwa.
Venom Wiki: ọkwa ihe ize ndụ, nha nkịtị na nchepụta ọsọ bụ nke anyị. Lee otú anyị si achọpụta ha: Otú anyị si atụ ihe ize ndụ.

Eziokwu ọ bụla dị na peeji a nwere nọmba na-egosi ebe o si. Ọ bụrụ na anyị mehiere ihe, ndo, anyị bụ ndị hụrụ anụmanụ n'anya, ọ bụghị akwụkwọ akụkọ sayensị. Gwa anyị na [email protected], anyị ga-edozi ya.

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