When thinking about venomous creatures, most people imagine spiders, snakes, and insects. However, few are aware of the existence of venomous mammals, which can be just as fascinating and dangerous. This article will explore the world of venomous mammals, shedding light on some unique species and how their venom works.

The Evolution of Venom in Mammals

Contrary to popular belief, venomous mammals are not an anomaly. Historically, mammals have used venom to protect themselves from predators, capture prey, or as a means of competition with other individuals. While venom is currently carried by only a small number of species, some studies have suggested that the evolution of venom in mammals is an ancient and widespread phenomenon.

Types of Venomous Mammals

There are several species of venomous mammals, each with unique characteristics. Some of the most well-known examples include:

1. Shrews

Shrews are small mammals with sharp, pointed teeth that look like small needles. These teeth are coated with venom, which the shrew uses to immobilize its prey and digest its food externally. The venom of a shrew is not life-threatening to humans, but it can still cause a painful sensation if bitten.

2. Slow Lorises

Slow lorises are native to Southeast Asia and have a unique venomous apparatus. They produce venom in glands located on the inside of their elbows and groom their fur with the venom, as well as deliver it through a bite. The venomous bite of a slow loris can cause anaphylactic shock in humans. However, the slow loris is under threat from the exotic pet trade and habitat loss.

3. European Mole

The European mole has venomous saliva that it uses to paralyze its prey before consuming it. The venom is toxic enough to kill small animals such as earthworms and insects, but it poses no threat to humans.

4. Platypus

Among the strangest venomous mammals is the platypus, which is native to Australia. The male platypus has venomous spurs on its hind legs, which are capable of delivering a powerful sting. While the venom is not lethal to humans, it can cause excruciating pain and swelling.

5. Northern Short-tailed Shrew

Native to North America, the northern short-tailed shrew also has venomous saliva. It uses this venom to immobilize and store its prey for later consumption. Although humans might experience mild pain and discomfort if bitten, the venom is not known to pose a significant threat.


Although they are relatively rare, venomous mammals can be found worldwide. These unique creatures have evolved their venomous capabilities for survival purposes, such as hunting, defense, or competition. As human awareness of venomous mammals expands, it is critical to understand the importance of preserving their habitats and promoting conservation efforts to protect them from potential threats.


1. Are there venomous mammals?

Yes, there are several species of venomous mammals, including shrews, slow lorises, the European mole, the platypus, and the northern short-tailed shrew.

2. Why are some mammals venomous?

Venom has evolved in some mammals for various purposes, including hunting, defense against predators, and competition with other individuals of the same species.

3. Are venomous mammals dangerous to humans?

While some venomous mammals can cause mild to severe discomfort if bitten, none are known to be lethal to humans. However, allergy to their venom may cause severe reactions in some individuals.



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