0634. zenbakia, guztira 1 402

Redback spider

Latrodectus hasselti

Izenari buruz: It is called the redback because of the distinctive red stripe along the top of its abdomen.1

Medikua behar duGutxitan da hilgarria, baina koska batek medikua behar du.

Armiarmak

KoskaJaten du: Haragia

Arriskua pertsonentzat: LarriaKoska batek medikua behar du. Heriotzak oso arraroak dira.

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

Non bizi den

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

Australia eta Ozeania

Hasiera

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

Luzera

1 cm (0,4 in)1

Abiadura handiena

0,92 km/h inguru (0,57 mph)

Lehorrean, kalkulu gutxi gorabeherakoa

Zer jaten du?

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

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

Nola ezagutu

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

Askotan honekin nahasten da: 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

Pozoi-ahalmena

Koska

Pozoia letaginetatik edo hortzetatik ateratzen da kosk egiten duenean.

Zer egiten du bere pozoiak?

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

Zein arriskutsua da pertsonentzat?

Arriskua pertsonentzat: LarriaKoska batek medikua behar du. Heriotzak oso arraroak dira.

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

Albiste ona: medikuek badute sendagai bat (antipozoia) edo tratamendu bat honetarako.1

Zer egiten du beldurtzen denean?

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

Kosk egiten badu

Garbitu koska eta jarri izotz-poltsa bat gainean minerako. Lortu mediku-laguntza mina handia bada, zabaltzen bada edo pertsona gaizki sentitzen bada.

Deitu beti lehenik zure larrialdi-zenbakira (112, 000, 911). Lehen sorospenei buruzko orientabide orokorra da hau, ez mediku-aholkua. Lehen sorospenen oinarriak

Egon seguru

Ez ukitu, ez harrapatu eta ez zirikatu inoiz animalia basati bat, txikia izan arren, eta lo edo hilda dagoela badirudi ere.
Utzi tartea. Bat aurkitzen baduzu, egon lasai, egin atzera poliki eta utzi bere bidetik joaten.
Batek kosk egiten badizu: egon lasai, egon geldi, deitu zure larrialdi-zenbakira (112, 000, 911) edo joan ospitalera azkar. Gogoratu nolakoa zen, argazki batek laguntzen du.

Ez dabil zure atzetik. Pozoia janaria harrapatzeko edo bere burua babesteko erabiltzen du, eta askoz nahiago du ezkutatu. Seguru egoteari buruz gehiago

Munduko zein tokitan?

Afrika Asia Europa Ipar Amerika Hego Amerika Australia eta Ozeania

Zein handia da?

Zein luzea da?

zure azazkalaren gainean esertzeko bezain txikia

Zein handia da Redback spider ZUREKIN alderatuta?

Matematika hutsa zure nabigatzailean. Ez da ezer gordetzen, ezta inora bidaltzen ere.

Zein azkarra da?

Dortoka bat 0,3 km/h inguru (0,19 mph)

Redback spider 0,92 km/h inguru (0,57 mph)

Oinez doan pertsona bat 5 km/h inguru (3,1 mph)

jakin beharrekoa

Datuak

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

Pozoi-adituentzat

Izen zientifikoa: Latrodectus hasselti
Taldea: Armiarmak
Familia: Theridiidae2
Ordena: Araneae
Kontinenteak: Australia eta Ozeania
Kumeak: 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
Bizi-iraupena: 3 urte inguru1
Arriskua pertsonentzat: 3 / 5: Larria3

Datuak nondik datozen

Redback spider (Wikipedia (CC BY-SA 4.0))
Latrodectus hasselti (iNaturalist): izenak eta sailkapena.
Venom Wiki: arrisku-maila, ohiko tamaina eta abiadura-kalkulua geureak dira. Ikusi nola kalkulatzen ditugun: Nola baloratzen dugun arriskua.

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