Known predators of spiders include other spiders, praying mantis, wasps, ants, snakes, birds, scorpions, lizards and small mammals. Humans are also threats to spiders.
While many people kill spiders that are found in the home, most spider species are not a threat to humans. Spiders in the home can prove beneficial for humans because spiders eat other insects and pests, such as termites, which may pose a bigger problem for the home. Some spider species are harmful to humans, so anyone bitten by a spider should keep the wound clean and consult a physician if it does not heal or becomes worse, states the National Geographic website.