Black Widow Spider Size report

Black Widow SpiderThe black widow spider is a large spider, the scientific name of the spider, its venom is highly poisonous, and it is one of the most venomous spiders in the world. The habitat of black widow spiders is mainly distributed in European countries along the Mediterranean coast.

In recent years, with the gradual expansion of the scope of human life, reports of people and animals being bitten and killed by black widow spiders are common worldwide. The black widow's venom is reported to be 15 times stronger than a rattlesnake's and can cause muscle aches and nausea, as well as make breathing difficult.

Black widow spiders get their common name from the popular belief that the female eats the male after mating, which rarely happens in nature. Read on to learn more about black widow spider living history and habits.

Black Widow Spider Basics

Black widows are poisonous arachnids, animals with a skeleton outside their body, a segmented body, and eight jointed legs. They are not insects. Female black widows are shiny black, with a red-orange hourglass pattern on their abdomen. Male black widows are not black, but brown or gray with small red spots. Males may exhibit red and white stripes on the waist depending on the species and are more colorful and finely patterned than females.

female black spider

Black Widow Spider Average Size

On average, male black widow spiders are smaller than females, reaching only about half their size in length. However, the legs of the male are considerably longer in proportion to the females. Most black widow spiders' bodies are 3 to 10 mm in size. Females are larger than males and can measure 13 mm in body length.

Habitat

Black widow spiders favor dark, secluded, and warm areas such as crevices and woodpiles. Inside the home, black widows typically hide in sheltered, dimly lit locations such as garages, dark corners, basements, etc. Black widows are nocturnal and spin webs during the daytime.

Hunting

Black widows use a silk-like substance to weave tangled-looking webs, typically close to the ground in covered or dark places, such as near drain pipes or under logs. The female hangs upside down in the bet to await her prey, exposing her bright markings as a warning to potential predators. The black widow will sense vibrations to the web when an unlucky intruder gets trapped. Once captured, the black widow injects its victims with poison, paralyzing them.

The black widow contributes to the balance of the ecosystem by consuming insects such as flies and mosquitoes. It also controls crop pest populations, feeding on pests that defoliate plants, including locusts, grasshoppers, beetles, and caterpillars.

Black Widow Spider on the wall

Reproduction

The black widow spider received its name due to a story about its mating behaviors. Upon approaching a web-spinning female spider, the male spider will wait for an indication of her willingness: females interested in mating remain still, allowing males to inseminate them. Then, female black widow spiders will kill and feed upon their mates. And the baby spiders stay in the cocoon for up to one month. However, it is a misconception that all female black widows kill and consume their mates. Rather, this behavior is typically only observed in captivity.

Black widows are shy. They are solitary, socializing only during copulation. Although poisonous, the black widow is not considered aggressive unless threatened. The male black widow spider is reclusive and hardly ever seen by humans.


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