BLACK WIDOW SPIDERS Caroline Picard 7/11/2018 | These venomous weavers hang out in woodpiles, fences, or other places with undisturbed debris. You can identify them by the red dots or hourglass shape found underneath the abdomen. According to the CDC, most bites occur when a person accidentally brushes against a web. The disruption prompts the black widow to strike, releasing a neurotoxic venom into the skin via two puncture marks. | Good Housekeeping-Getty images