Hickory Horned Devil

Hickory Horned Devil

By Shawn Olson

Posted on 09.05.05

Over the weekend my good friend Jeremy Martin came over with an exciting treat--a Hickory Horned Devil... the large caterpillar of the Regal Moth or the Royal Walnut Moth.

I had never seen the hickory horned devil, though I had known of the regal moth from insect manuals. Jeremy found this fascinating creature crossing a path at Prairie Oaks park west of Columbus, Ohio. He returned it to the park after allowing me to photograph these images.

The hickory horned devil in these photos measured around six inches in length. From what I've read online, the appearance of the caterpillar is a bluff--it looks ferocious but is harmless. Unlike most caterpillars that spin cocoons, the hickory horned devil burrows into the ground to transform into an adult moth.

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

hickory horned devil caterpillar photo

Learn More About the Hickory Horned Devil
Hickory Horned Devil, MU Extension
Hickory Horned Devil, North Carolina
Hickory Horned Devil - Egg to Caterpillars
Hickory Horned Devil Photos

Learn More About the Regal Moth
Regal Moth - Citheronia regalis (Fabricius)


Note: Information on this page regarding the Hickory Horned Devil was collected from the links above, as well as from information collected by Jeremy Martin.


Also, see more caterpillar photos.
Copyright © 2005-2009 by Shawn Olson.

Subscribe to this guestbookComments on Hickory Horned Devil

Ashleigh Hawkins said:

I live in southern missouri and when i was about 10 years old one of these monsters fell out of a hickory tree and latched onto my bottom lip. my lip swelled up like a poisoned pup, it was horrible. my husband has never beleived it until he saw this picture. we call them hickory monsters here.

Aaron free said:

deos ayone now where to buy them.................. becuse I keep them in a tent to let them change then I breed them

dakhari manney said:

the hickoy horned devil carterpiller of thr regal mouth

Levi Fogle said:

Yea, found one of these Caterpillars in my back yard in carrier mills Illinois many years ago, Scared the crap out of me...any ways i was always curios if it was even native to southern Illinois since everyone i showed it to has never seen or heard of it....

Margaret Knight said:

Im a junior in highschool and my cross country team and myself ran pass one of these horned devils setting up the course. it was huge it broke a twig in half it was so cool we have pictures and everything. it was in frick park PA

michelle lewis said:

We found a hhd in our yard today and we were afraid that it was dangerous. Your website had the most comprehensive info and wonderful pictures of the hhd. Thank you.

Bill Oliver said:

My girlfriend, Cindy and I ran across one of these this past weekend while camping in the north Georgia mountains. She found it next to our fishing gear and thinking it was one of my lures she almost picked it up. We had never heard of one before. What a beautiful and amazing creature!!

MELISSA PIERCE said:

MY HUSBAND FOUND A HICKORY HORNED DEVIL IN THE WOODS BY OUR HOUSE. HE BROUGHT IT IN FOR OUR CHILDREN, AGES 6 AND 11. THEY WERE SO AMAZED BY THE COLORS, HORNS, AND OVERALL APPEARANCE OF THIS BEAUTIFUL CREATURE, THAT THEY BEGAN TO RESEARCH MORE INFORMATION. MY SON, THE 6 YEAR OLD TOOK IT TO SHOW HIS FIRST GRADE CLASS. THEY WERE FASCINATED.

COLBY SHORT said:

HI,
I'M COLBY SHORT. I'M TEN YEARS OLD AND I LIVE IN ATHENS, GA. (GO DAWGS!!!) MY MOM AND I FOUND THIS CUTE LITTLE DEVIL UNDER A PECAN TREE IN OUR FRONT YARD.THANKS TO YOUR WEB SITE WE WERE ABLE TO FIND OUT ALOT OF INFO ABOUT THE HICKORY HORNED DEVIL. I'M TAKING THIS LITTLE DEVIL TO SCHOOL TOMORROW THEN I PLAN TO RELEASE HIM UNDER THE PECAN TREE WHERE WE FOUND HIM!!! THANKS FOR YOUR HELP AND INFO.... :)

JoAnn Weaver said:

I happened across one of these this afternoon in my backyard under the walnut tree. It was such an odd color & shape, I thought it was a broken piece from a plastic toy. Then it moved! I moved the little devil (haha) to a safe place and have been searching for info. I'm glad to have found your web site.

Wayne Hintze said:

Spied one of these creatures in the middle of the road in Westminster, Md. My 6 yr old son says we're being invaded by aliens from Mars. My 8 yr old daughter says it doesn't need to dress up for Halloween. All I can say is, unbelievable!

Ms. Dennis said:

My son's day care class found this in the back yard. We live in KY. I've never been a fan of creatures with more than 4 legs, but I must admit I was amazed at this critter! Yesterday, the class let "Herbie" go so he could burrow into the ground. It was sorta cute in a bazzar way!

Chafin Sherry said:

My children and I found one of these in our front yard!!! Yikes!! the scariest thing I'd ever seen, I stared and stared at it... I thought we'd been invaded!!!

Mary Jordahl said:

We saw the Hickory Horned devil in Alton Il in the Pierre Marquette State Park. We were all so excited as groups of people gawked and stared at this amazing creature. We did not know what it was and are excited to find out.

Reid Family said:

Found a great specimen in our shrubbery across from a young hickory tree. Awesome to view and study then we released it back to the shrubs so it could burrow. The Reids

Mandy Fitzgerral said:

aaarrgghhh - we found one in our yard at work today. Somebody put it in a box and brought it in to show the office staff. I felt sure it had come in on a shipment from the far east or somewhere. It scared the bejeebers out of me. Glad to know that it was harmless and native to the US.
Fascinating but weird!

Betty Alford said:

This is the scariest thing I ever saw! If that fell on me out of a tree I would run screaming for days! But I cant stop LOOKING at it! Excellent captures

alex g said:

i found one of these about 2 years ago near my dog, it was hanging upside down from a branch and my dog kept barking at it, so i went out to see what it was, and it fell right in my hand! at first i thought it was deadly, due to the color scheme, but it was harmless!

Amy Sorensen said:

My kids and I had gone to the backyard to play in Kingwood, TX and we found this huge catapillar in the grass. There was alot of excitment. I had no idea what kind of catapillar it was. Simple amazing to see a Hickory Horned Devil. Wow!

Kim Entzminger said:

My two year old spotted this caterpillar in our backyard. He was understandably a little scared of it. We're in Western, SC. It's the first time I've ever seen one.

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hickory horned devil rearRear end of the hickory horned devil, the caterpillar of the regal moth.
hickory horned devil legsUnderside of the hickory horned devil. Notice the wasp eggs near the bottom.
hickory horned devilCloseup of the face of a hickory horned devil caterpillar which will turn into a regal moth.
hickory horned devilThe hickory horned devil crawling through grass, caterpillar of the Regal Moth.
hickory horned devilThe hickory horned devil, caterpillar of the Regal Moth.
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