África
Asia
Europa
América do Sur
Australia e Oceanía
Antártida
Océano Pacífico
Océano Atlántico
Océano Índico
Océano Glacial Ártico
Mar Mediterráneo
Mar Vermello
Mar Caribe
Mar do Coral
Mar da China Meridional
Mar de Filipinas
Mar de Andamán
Mar do Norte
Mar de Timor e de Arafura
Golfo de Bengala
Golfo de California
Western black widow
MordeThe 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
Como recoñecelo
- 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
Adoita confundirse con: It was once described as a subspecies of Latrodectus mactans and is closely related to the northern species Latrodectus variolus.1
Poder da pezoña
A pezoña sae polos seus cairos ou dentes cando morde.
Que fai a súa pezoña?
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
Que perigoso é para as persoas?
Perigo para as persoas: GraveUnha mordedura precisa un médico. As mortes son moi raras.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
Que fai cando ten medo?
Juveniles and females can fling a sticky ball of silk at predators, which can stop most of them.1
Se morde
- Lava a mordedura e ponlle unha bolsa de xeo para a dor. Busca axuda médica se a dor é forte, se se estende ou se a persoa se sente mal.
Chama sempre primeiro ao teu número de emerxencias (112, 000, 911). Isto son consellos xerais de primeiros auxilios, non consello médico. Primeiros auxilios básicos
Mantente a salvo
- Nunca toques, collas nin molestes un animal salvaxe, aínda que sexa pequeno e aínda que pareza durmido ou morto.
- Déixalle espazo. Se atopas un, mantén a calma, recúa amodo e déixao ir polo seu camiño.
- Se un te morde: mantén a calma, non te movas, chama ao teu número de emerxencias (112, 000, 911) ou vai rápido a un hospital. Lembra como era, unha foto axuda.
Non vai a por ti. Usa a súa pezoña para cazar comida ou para defenderse, e prefire con moito agocharse. Máis sobre como estar a salvo
En que lugar do mundo?
Que tamaño ten?
Canto mide?
máis curto ca o teu dedo meniñoQue tamaño ten Western black widow comparado CONTIGO?
Só son contas no teu navegador. Non se garda nin se envía nada a ningures.
Que rápido é?
Datos
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
Desmontamitos
Mito: A black widow bite is usually deadly.
Verdade: 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
De onde veñen os datos
- Latrodectus hesperus (Wikipedia (CC BY-SA 4.0))
- Latrodectus hesperus (iNaturalist): nomes e clasificación.
- Venom Wiki: o nivel de perigo, o tamaño típico e a velocidade estimada son nosos. Mira como os calculamos: Como valoramos o perigo.
Cada dato desta páxina ten un número que leva á súa fonte. Se nos equivocamos nalgo, sentímolo, somos fans dos animais, non unha revista científica. Dínolo en [email protected] e arranxarémolo.
O escorpión ten fame! Venom Wiki é un proxecto dunha soa persoa: gratis, sen anuncios e sen rastrexadores. Unha pequena propina axuda a mantelo en liña.Dálle de comer ao escorpión
Brown recluse
Southern black widow
Northern black widow
Bold jumping spider
Golden silk orb-weaver
Central American wandering spider
Terciopelo
Eastern coral snake
Eastern diamondback rattlesnake
Eyelash viper
Timber rattlesnake
Western diamondback rattlesnake