Black widows are notorious spiders identified by the colored, hourglass-shaped mark ... The animals most at risk from the black widow's bite are insects—and male black widow spiders.

Black widows’ red hourglass tells birds to back off but ... Nicholas Brandley didn’t think so, and embraced the study of black widow spiders. “Their fangs don’t even usually pierce human ...

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.

You also may see a brown widow spider, or Latrodectus geometricus, which is a close relative of black widows. It's tan and brown with black marks on it, and it may also have an hourglass shape ...

and a yellow-orange hourglass marking on its abdomen. The bite is neuropathic like the black widow, but it generally does not spread, so it’s painful but not life threatening. These spiders are ...