Puss Moth Caterpillar

10 year- Living Caterpillar that Can Shoot Acid  | Puss Moth Caterpillar

If you happen to come across a photo of the Puss Moth Caterpillar while scrolling through your social media feed, you might be captivated by its furry appearance. However, don’t let its charming exterior deceive you. This seemingly harmless caterpillar is, in fact, one of the most venomous in North America. And it is one of the longest-living caterpillar species in the world. In this article, we’ll explore the intriguing aspects of the Puss Moth Caterpillar, catering to the curiosity of those who want to know more about this little creature.

Meet the Puss Moth Caterpillar

The Puss Moth Caterpillar, known scientifically as Megalopyge opercularis, is a small yet fascinating creature that measures about an inch in length. Despite its diminutive size, this caterpillar packs quite a punch with its potent defence mechanisms. Native to the southern United States and Mexico, the Puss Moth Caterpillar can be found in various habitats, including forests, woodlands, and gardens.

The caterpillar derives its intriguing name from its furry appearance, which strikingly resembles that of a cat. This resemblance adds to its charm and allure, but one should never forget that beneath those soft-looking bristles lies a hidden danger.

Acid shooting and Venom

The Puss Moth Caterpillar has evolved a range of defence mechanisms to protect itself from potential predators. Firstly, its furry exterior acts as a natural deterrent, making it appear less appetizing to those who might otherwise consider making a meal out of it.

Additionally, the caterpillar sports two long, pointed tails, adorned with black blobs. These tails serve a dual purpose: when threatened, the caterpillar waves them in the air as a warning sign to would-be attackers. More intriguingly, the caterpillar can also release formic acid as a defensive measure. This acid squirted from the black-tipped tails can be an unpleasant surprise for predators, leaving them to regret their decision to approach the caterpillar.

However, the most potent weapon in the Puss Moth Caterpillar’s arsenal is its venomous sting. The venom contains a substance called pederin. It is a powerful irritant that can cause severe pain, swelling, and allergic reactions in humans.

Pointed Tails

Interesting facts 

  • The puss moth caterpillar’s sting is so painful. It has been compared to being stung by a wasp or a bee.
  • The caterpillar’s venom contains a substance called pederin, which is a potent irritant.
  • The puss moth caterpillar’s sting can cause a variety of symptoms, including pain, swelling, redness, nausea, vomiting, and difficulty breathing.
  • In rare cases, the puss moth caterpillar’s sting can be fatal.


The Puss Moth Caterpillar might be a captivating sight with its furry appearance. But it’s a creature that demands respect and caution. Its venomous sting, coupled with its other defence mechanisms, serves as a reminder that nature’s wonders can be as fascinating as they are perilous. As you appreciate these creatures from a distance, let this knowledge deepen your understanding. And respect for the delicate balance of life in the natural world.

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