“The northern black widow, Latrodectus variolus, lives in the northeastern U.S. and southeastern Canada,” Crawford says. These females lack the classic hourglass but instead have two separate ...

the southern black widow and the northern black widow. Although they are similar in appearance, there are slight differences ...

The animals most at risk from the black widow's bite are insects—and male black widow spiders. Females sometimes kill and eat their counterparts after mating in a macabre behavior that gave the ...