How to Identify a Black Widow Spider There's probably a specific image that comes to mind when you picture a black widow spider: A large, shiny, black spider with a red hourglass on its belly.

Fortunately, fatalities are fairly rare; the spiders are nonaggressive and bite only in self-defense, such as when someone accidentally sits on them. The animals most at risk from the black widow' ...

The brown recluse and black widow are the most common venomous spiders in the U.S. and Alabama. What are their habitats and how to prevent a bite.

Although they resemble black widow spiders, they are not as harmful ... What spider have you found in your house? Read our identification guides to the most common spiders found in UK homes.