The red colorations on many spiders can appear almost orange ... they feature red dots on a black abdomen, though the hourglass shape is not as defined. They have a light brown body and long ...

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.

Bites from these spiders can cause serious health effects and require immediate medical attention. You can quickly identify a black widow by the bright red hourglass shape on their abdomens.

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.