They look harmless, but these caterpillars are venomous.
Key Takeaways
Have you ever heard of the southern flannel moth (Megalopyge opercularis)?
Maybe you’ve seen one but didn’t know what it was.
Credit: Nature’s Images/Getty Images
It has a very distinctive, fluffy look (even its wings are covered with silk hairs).
If you ever come across one, you definitely won’t miss itbut you should definitely avoid it.
In fact, it is one of the most dangerous caterpillars in the United States.
These setae have the appearance of animal fur, which is why many say the caterpillars resemble Persian cats.
The “fur” is sometimes extremely curly, making the larva look even fluffier.
Their light yellow eggs are slightly rounded and laid in clusters on leaves.
They may look like a speck of dust.
Where Do Flannel Moth Caterpillars Live?
check that you teach children about these caterpillars and warn them not to touch them.
They can also be found as far west as Texas and Arkansas, and also in the desert southwest.
How Dangerous Are Flannel Moth Caterpillars?
Unfortunately, the “fur” is nothing like a cuddly, feline friend.
It actually contains venomous spines to protect it from predators.
Coming into contact with these spines will cause extremely painful reactions in the skin.
Caterpillars that are more advanced in the larval stage have the most potent defense.
Is The Adult Moth Harmful?
The adult southern flannel moth is harmless on its own.
Sometimes, the spines become deeply embedded in the skin and they need to be removed.
Use strips of cellophane tape to remove any hairs in skin and repeat until you have gotten them out.
Tweezers may also help.
Apply an ice pack to reduce swelling and hydrocortisone can relieve any itching.
As with other stings, a paste of baking soda and water can help alleviate any discomfort.
In the best-case scenario, reactions to the sting are localized to the affected area.
Both are also hairy.
Saddleback caterpillars also sting.
Theses caterpillars hatch in summer and fall.
Their numbers are usually not enough to be noticed but outbreaks can occur.
Caterpillars with bright colors, fur, spines, or spikes may be poisonous.
It is best not to touch any caterpillars you are unsure about.
Since caterpillars are often found on the underside of leaves, wear gloves to protect your hands while gardening.
University of Florida IFAS Extension.
NC State Extension.Puss Caterpillar.
Spillyards, Allie.Rockwall Child Hospitalized After Venomous Caterpillar Sting.
October 12, 2018.
Missouri Department of Conservation.Flannel Moths.
Roach, DO, James.Can a Caterpillar Cause a Skin Rash?Cleveland Clinic health essentials.
October 4, 2024.
