The red and black mason wasp uses its sting to inject a mild venom that can affect various animals. While the sting may cause temporary discomfort in humans and domestic animals like dogs and cats, it's often non-lethal. However, smaller creatures such as birds and other insects might experience more severe reactions to the venom due to their size and differences in physiology. In most cases, the venom is used defensively or to incapacitate prey rather than for predatory purposes.