The black widow spider

Description[ edit ] Female widow spiders are typically dark brown or a shiny black in colour when they are full grown, usually exhibiting a red or orange hourglass on the ventral surface underside of the abdomen; some may have a pair of red spots or have no marking at all.

The black widow spider

Causes: Why do they bite?

Black Widow spiders are found on every continent except Antarctica. Black Widow spiders live in warmer regions of the world. The spiders derive their name from the popular assertion that the female black widow spider feeds on the male spiders after mating.

Black widow spiders can be found on every continent except Antarctica and mainly inhabit warmer regions. Description The black widow spiders are popular for the red hourglass shape under their abdomen and are typically shiny black or dark brown in color.

Some possess a pair of red spots on their back while others do not have markings at all. The male spider has various red or red and white marks on the upper part of the abdomen while the female does not have any bright markings. The black widow spider can grow up to 0.

Bite They produce unusually potent venom that causes a condition known as latrodectism. The female spiders have large venom glands and their bite is particularly harmful to large animals including humans.

However, the spiders rarely bite and bites are rarely fatal. The bites only occur when they cannot escape danger. Symptoms of bites include increased blood pressure, fever, nausea, and sweating. These symptoms may last days or persist for more than one week.

The black widow spider

Medication is recommended as soon as possible to relieve the victim of the pain. Habitat The black widow spiders inhabit mainly the warm regions of the world.

They are found in marginal land areas with sparse vegetation, hollow logs, and stumps. The spiders are rarely found indoors but may enter human houses on items brought inside.

Indoors, the black widow spider prefers cluttered areas such as garages, crawl space, and basements. Once they settle in these areas, the black widow spiders spin irregular webs which are mainly built at night and near the ground level.

The spiders hang upside down on the web once completed. Distribution and Range The black widow spiders can be found in all the continents except Antarctica.The Black Widow gets its name do to the fact the female spider kills the male after mating, but other species of spiders do the same.

There are 5 species of black widows in the U.S. the southern and northern widow are the most common. Hundreds of spider species live in Indiana but only the black widow and brown recluse are capable of seriously injuring humans with their bites, according to the state's Department of Natural.

The widow spiders are members of the spider genus Latrodectus, in the family Theridiidae. Latrodectus includes approximately 31 recognized venomous species, with the black widow spider. Black widow spider bites can be dangerous but fatal bites are rare.

Black widow spider bites often are painful right away.

Facts, Identification & Control

After a bad bite, severe pain and muscle cramps can start in a couple of hours. Pain and muscle cramps can be treated. Antivenin is available but is needed only rarely. The female black widow spider possesses venom that is 15 times stronger than the venom of a rattlesnake. Even though their venom is particularly potent, only about 5% of black widows attacks are fatal and victims usually recover in less than a week.

Typically, bites from a black widow cause swelling and numbness. If you are bitten by a spider, you should see a doctor immediately.

If possible, you should also bring along the spider so the.

black widow | Appearance, Species, & Bite |