Venom Wiki / Semua makhluk / Labah-labah

No. 0631 daripada 1 402

Western black widow

Latrodectus hesperus

Perlu jumpa doktorJarang membawa maut, tetapi gigitannya perlu dirawat doktor.

Labah-labah

GigitanMakan: Daging

Bahaya kepada manusia: SeriusGigitannya perlu dirawat doktor. Kematian sangat jarang berlaku.

The western black widow is a venomous spider that lives in western North America. The female is black, often with a red hourglass mark on her belly, and her webs are tangled and irregular. Her venom is strong, so it is worth knowing what she looks like.1

Hidup di

Western North America: south-western Canada (British Columbia to Manitoba), the Pacific Coast, Texas, Oklahoma, Kansas, and Mexico1

Amerika Utara

Laman utama

It builds tangled webs low above the ground. It is commonly found near the Canada-US border and less commonly across the grasslands of the Canadian Prairies.1

Panjang

1.4 cm hingga 1.6 cm (0.6 in hingga 0.6 in)1

Kelajuan maksimum

kira-kira 0.98 km/j (0.61 mph)

Di darat, anggaran kasar

Apa yang ia makan?

It hangs upside down near the centre of its web and waits for insects to land in it. It bites the prey, injects venom, and wraps it in silk. Beetles and ants, wasps and bumblebees make up most of its prey.1

Gambar Western black widow — Western black widow. Gambar: Luke Padon. CC BY 4.0, iNaturalist.

Cara mengenalinya

The female is about 14–16 mm long and black, often with an hourglass-shaped mark on the lower abdomen.1
The hourglass mark is usually red, but it can be yellow and, very rarely, white.1
The male is about half the female's length and is generally beige, with lighter striping on the abdomen.1
Its webs are irregular or tangled, with no obvious overall pattern.1

Sering dikelirukan dengan: It was once described as a subspecies of Latrodectus mactans and is closely related to the northern species Latrodectus variolus.1

Kuasa bisa

Gigitan

Bisa keluar melalui taring atau giginya apabila ia menggigit.

Apa kesan bisanya?

The female's venom contains a neurotoxin called α-latrotoxin, which attacks the nerves. In humans, its symptoms include pain, nausea, vomiting, goosebumps and localised sweating.1

Berapa bahaya ia kepada manusia?

Bahaya kepada manusia: SeriusGigitannya perlu dirawat doktor. Kematian sangat jarang berlaku.

Historical reports gave fatality rates between 0.5% and 12%. However, recent studies have not been able to confirm any deaths from the U.S. species of Latrodectus, including zero deaths among 23,409 documented bites from 2000 through 2008.1

Apa yang ia buat apabila takut?

Juveniles and females can fling a sticky ball of silk at predators, which can stop most of them.1

Jika ia menggigit

Basuh tempat gigitan dan letakkan pek ais untuk menghilangkan sakit. Dapatkan bantuan perubatan jika sakitnya kuat, merebak atau orang itu berasa tidak sihat.

Sentiasa hubungi nombor kecemasan dahulu (112, 000, 911). Ini panduan pertolongan cemas umum, bukan nasihat perubatan. Asas pertolongan cemas

Kekal selamat

Jangan sesekali sentuh, tangkap atau usik haiwan liar, walaupun yang kecil, dan walaupun ia nampak tidur atau mati.
Beri ia ruang. Jika kamu terjumpa, bertenang, undur perlahan-lahan dan biarkan ia pergi.
Jika ia menggigit kamu: bertenang, jangan bergerak, hubungi nombor kecemasan (112, 000, 911) atau pergi ke hospital dengan segera. Ingat rupanya, gambar boleh membantu.

Ia bukan mahu memburu kamu. Ia guna bisanya untuk menangkap makanan atau melindungi diri, dan ia lebih suka bersembunyi. Lagi tentang keselamatan

Di mana di dunia?

Afrika Asia Eropah Amerika Utara Amerika Selatan Australia & Oceania

Berapa besar ia?

Berapa panjang ia?

lebih pendek daripada jari kelingking kamu

Berapa besar Western black widow berbanding KAMU?

Hanya matematik dalam pelayar kamu. Tiada apa yang disimpan atau dihantar ke mana-mana.

Berapa laju ia?

Kura-kura darat kira-kira 0.3 km/j (0.19 mph)

Western black widow kira-kira 0.98 km/j (0.61 mph)

Orang berjalan kira-kira 5 km/j (3.1 mph)

berguna untuk diketahui

Fakta

When prey hits a gumfoot thread, the thread breaks and creates tension that pulls the line and prey up to the spider.1

This spider is an opportunistic cannibal, and it may eat other members of its own kind when prey is scarce, when it is very hungry, or in self-defence.1

The silk is strongly sticky, and its strength is similar to that of silk from orb-weaving spiders.1

Males can be preferred by females based on the webs, with well-fed females chosen over starved ones.1

Males may mate several times during their relatively short lives.1

Pemecah mitos

Mitos: A black widow bite is usually deadly.

Hakikat: Recent studies have not confirmed any deaths from the U.S. species of Latrodectus, including zero deaths among 23,409 documented bites from 2000 through 2008.1

Untuk pakar bisa

Nama saintifik: Latrodectus hesperus
Kumpulan: Labah-labah
Keluarga: Theridiidae2
Susunan: Araneae
Benua-benua: Amerika Utara
Anak: Females produce egg sacs, and the young are born in the months from May to October.1
Bahaya kepada manusia: 3 / 5: Serius3

Dari mana fakta datang

Latrodectus hesperus (Wikipedia (CC BY-SA 4.0))
Latrodectus hesperus (iNaturalist): nama dan pengelasan.
Venom Wiki: tahap bahaya, saiz biasa dan anggaran kelajuan adalah penilaian kami sendiri. Lihat cara kami mengiranya: Cara kami menilai bahaya.

Setiap fakta di halaman ini ada nombor yang menunjuk kepada sumbernya. Jika kami tersilap, maaf, kami peminat haiwan, bukan jurnal sains. Beritahu kami di [email protected] dan kami akan betulkan.

Kala jengking lapar! Venom Wiki ialah projek seorang lelaki: percuma, tanpa iklan dan tanpa penjejak. Sedikit sumbangan membantu memastikannya terus dalam talian.Beri kala jengking makan