No. 0631 dari 1 402

Western black widow

Latrodectus hesperus

Perlu ke dokterJarang mematikan, tetapi gigitan perlu ke dokter.

GigitanMakan: Daging

Bahaya bagi manusia: SeriusGigitan perlu ke dokter. Kematian sangat jarang.

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

Beranda

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 sampai 1,6 cm (0,6 in sampai 0,6 in)1

Kecepatan tertinggi

sekitar 0,98 km/jam (0,61 mph)

Di darat, perkiraan kasar

Apa makanannya?

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

Foto Western black widow — Western black widow. Foto: 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 tertukar dengan: It was once described as a subspecies of Latrodectus mactans and is closely related to the northern species Latrodectus variolus.1

Kekuatan bisa

Gigitan

Bisanya keluar lewat taring atau gigi saat menggigit.

Apa efek 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

Seberapa berbahaya bagi manusia?

Bahaya bagi manusia: SeriusGigitan perlu ke dokter. Kematian sangat jarang.

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 dilakukannya saat takut?

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

Jika ia menggigit

Cuci gigitan dan kompres dengan es untuk meredakan nyeri. Cari bantuan medis jika nyerinya kuat, menyebar, atau orangnya merasa tidak enak badan.

Selalu hubungi nomor darurat dulu (112, 000, 911). Ini panduan pertolongan pertama umum, bukan nasihat medis. Dasar-dasar pertolongan pertama

Tetap aman

Jangan pernah menyentuh, menangkap, atau mengganggu hewan liar, walaupun kecil, dan walaupun tampak tidur atau mati.
Beri ia ruang. Jika bertemu, tetap tenang, mundur perlahan, dan biarkan ia pergi.
Jika ia menggigitmu: tetap tenang, jangan bergerak, hubungi nomor darurat (112, 000, 911) atau segera ke rumah sakit. Ingat seperti apa rupanya, foto sangat membantu.

Ia tidak mengincarmu. Ia memakai bisanya untuk menangkap makanan atau melindungi diri, dan ia jauh lebih suka bersembunyi. Lebih lanjut tentang tetap aman

Di mana di dunia?

Afrika Asia Eropa Amerika Utara Amerika Selatan Australia dan Oseania

Seberapa besar dia?

Seberapa panjang dia?

lebih pendek dari jari kelingkingmu

Seberapa besar Western black widow dibandingkan KAMU?

Hanya hitungan di browsermu. Tidak ada yang disimpan atau dikirim ke mana pun.

Seberapa cepat dia?

Kura-kura darat sekitar 0,3 km/jam (0,19 mph)

Western black widow sekitar 0,98 km/jam (0,61 mph)

Orang yang berjalan sekitar 5 km/jam (3,1 mph)

layak 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

Pembongkar mitos

Mitos: A black widow bite is usually deadly.

Faktanya: 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 ahli bisa

Nama ilmiah: Latrodectus hesperus
Kelompok: Laba-laba
Keluarga: Theridiidae2
Urutan: Araneae
Benua: Amerika Utara
Anak: Females produce egg sacs, and the young are born in the months from May to October.1
Bahaya bagi manusia: 3 / 5: Serius3

Dari mana faktanya berasal

Latrodectus hesperus (Wikipedia (CC BY-SA 4.0))
Latrodectus hesperus (iNaturalist): nama dan klasifikasi.
Venom Wiki: tingkat bahaya, ukuran umum, dan perkiraan kecepatan adalah buatan kami. Lihat cara kami menghitungnya: Cara kami menilai bahaya.

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