Most female black widow spiders have a red or orange hourglass mark on their abdomen, although this can vary from one spider ...

The most infamous is the black widow, with its shiny black body and notable red hourglass marking. The red colorations on many spiders can appear almost orange. Therefore, orange-and-black and red ...

Black widows are notorious spiders identified by the colored, hourglass-shaped mark on their abdomens. Several species answer to the name, and they are found in temperate regions around the world.

Venom 15 times stronger than a rattlesnake — the black widow spider. What happens when it bites? All black with a red hourglass, just bigger than a paperclip. Only the female can bite humans.