Repipta taurus, the red bull assassin, is a species of assassin bug in the family Reduviidae. These predators feed on other insects and ambush them by perching on a plant, perfectly still until an insect comes close. An assassin bug spears its victim, injects lethal venom or digestive juices to kill it, and then sucks on the prey to feed. These bugs also use this beak to defend themselves from predators.