Young females are more fertile and easy to woo; older females often mate and then eat the male alive. No wonder they’re called widow spiders. To get sex with an older female, a male might fight ...

Their behaviour has been known to be territorial. Hamsters are cute little mammals who surprisingly engage in cannibalism.

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.