Can a spider venom kill its prey all the time?

No, spider venom does not always kill its prey. While many Spiders have venom that can quickly incapacitate or kill their prey, the effectiveness can vary depending on the species of spider and the type of prey. Some spiders may use their venom primarily to immobilize or subdue prey without necessarily killing it outright, allowing them to consume it later. Additionally, certain prey species may have developed resistance to specific spider venoms.