Spiders are known for their unique survival tactics, and playing dead—also called thanatosis—is one of them. Here are four reasons why spiders use this defense mechanism:

Avoiding PredatorsMany spiders play dead to escape predators such as birds, lizards, and other insects. By remaining motionless, they become less noticeable or unappealing to predators that prefer live prey.

Escaping ThreatsSome spiders use thanatosis as a last resort when caught by a predator. By going limp, they may trick the attacker into loosening its grip, giving them a chance to escape.