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Writer's pictureFernando . G

Tomcat Beetles in Bali: The Creepy-Crawlies You Might Want to Watch Out For

So, you’ve heard of the beautiful beaches, vibrant culture, and tasty cuisine in Bali, but what about the creepy crawlies? One little critter that’s been catching some attention lately is the Tomcat Beetle or Rove Beetle as the locals refer to them. While they’re not out to ruin your holiday, they do have a defence mechanism that might leave you with a lingering memory. 


In this blog, we’ll cover everything you need to know about these beetles, from what they look like and how they defend themselves, to what happens if you get sprayed, and how to treat any irritation. By the end, you’ll be well-prepared to spot one and know exactly what to do - without overreacting. Let's dive in!


A Tomcat Beetle or Rove Beetle on a leaf in Bali

What on Earth Are Tomcat Beetles?

First things first, the Tomcat beetle (Platynota Idaeus) isn’t exactly what you'd picture when you hear “tomcat.” No furry, cuddly feline here. These beetles are small (about the size of your thumb) with a reddish-brown colour and a slightly alarming shape. You'll find them in Bali’s tropical landscapes usually around trees and plants. Basically anywhere there's lush greenery.


But here’s the kicker - these little guys have a rather unpleasant defence mechanism, and that’s what’s got people talking.


 

How Can Tomcat Beetles Hurt You?

Okay, don’t panic just yet. Tomcat beetles aren’t out to bite you or chase you down the street. They don’t even have venom or sharp claws. What they do have, however, is a pretty effective spray that can cause a bit of a reaction if it hits your skin. When threatened (or, let’s face it, just mildly annoyed), they release a foul-smelling substance that can cause irritation or a mild burning sensation on the skin.


So, while it's definitely not pleasant, it’s also not the end of the world. Think of it like stepping into a patch of nettles but with a very memorable smell attached.


 

What Happens If You Get Sprayed?

If you do get caught in the crossfire of a Tomcat beetle’s defence, here's what you can expect:

  1. The Shock: You’ll notice a strong, pungent smell right away. It’s like rotten eggs mixed with something far worse. Trust us, you won’t forget it.


  2. The Irritation: Dr. Swaid Abdullah, an expert in veterinary parasitology, explains:"Initial symptoms include reddening of the skin and a 'burning' sensation. This is followed by painful irritation and itching, and if untreated, it can lead to extensive pustules and blistering of the skin within four days."


    That said, symptoms vary greatly from person to person. For most, the reaction is a mildly itchy rash that clears up with basic care.


  3. The Remedy: If you’ve been sprayed, just wash the affected area with soap and water. It should calm down after a few minutes. You might want to apply a cold compress if you're feeling particularly sensitive or head to the pharmacy and purchase some Hydrocortisone Cream. Calamine Lotion, Aloe Vera Gel and Antihistamine Creams can also be helpful.


    Burns and scars left from a Tomcat beetle on a ladies leg in Bali

How Common Is It to Get Sprayed?

Before you start swatting at every beetle you see, know this: it’s pretty rare to get sprayed by a Tomcat beetle. These beetles generally don’t seek out humans and are more likely to scurry away if they feel threatened. So unless you’re actively poking around the trees or sitting on a jungle floor (not the most common holiday activities), it’s not something you should expect on your vacation. You’re far more likely to have a perfectly pleasant holiday and never encounter a Tomcat beetle at all. 


 

Interesting Facts About Tomcat Beetles in Bali

  • They’re part of the ecosystem: While they may not win any popularity contests, Tomcat beetles play a role in controlling other insect populations. So, they’ve got their place in the natural order.

  • They’re seasonal: If you're visiting Bali during the wet season, you might be more likely to encounter them. The dry months tend to be less eventful on the Tomcat front.

  • Cultural quirks: Locals often have their own ways of dealing with these beetles. Some simply leave them be, while others might chuckle at tourist's slightly over-the-top reaction.


    Tomcat beetle in Bali

Tomcat beetles are a quirky part of Bali’s wildlife, and while their defence spray is unpleasant, it’s nothing to lose sleep over. They’re not looking to attack you, and the likelihood of being sprayed is pretty low. Just stay a little wary (but not too worried), and you’ll be fine.


Bali’s still a magical place full of sun, sand, and culture. Don’t let a little beetle spoil that. So, enjoy your holiday, maybe give the trees a bit of space, and if you do encounter a Tomcat beetle, just remember: it’s more of a “wow, that was weird” moment than anything else.

Happy travels—and may your only surprises be in the form of delicious Balinese food and stunning beach sunsets!


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