Category Archives: Caterpillars and Pupa   rss

Gulf Fritillary Caterpillar

Gulf Fritillary
Location:  Suburb North of Atlanta, GA
September 24, 2010 8:43 am
My son noticed this orange and black spiked caterpillar on our way into the zoo yesterday. After recently becoming alerted to the stinging power of certain spiked/barbed caterpillars like the saddleback from your site, I cautioned the kiddos not to touch this guy. I didn’t think I recalled seeing him on the list of stinging butterflies-to-be but caution never stung anyone. Sadly I did not have my real camera with me, but my phone grabbed an image I was later able to identify, I think, as the Gulf Fritillary.
Thanks to you guys when we also encountered a Sycamore Tussock inside the zoo I did know it was harmless. After much reassurance to my friend that I *knew* it was safe, I was then able to assist her young son in gently petting him.
I noticed you have many pictures of the Gulf Fritillary butterfly but not many of the pretty orange caterpillar. Maybe these will be of interest.
Signature:  Resa

gulf fritillary cat resa 300x182 Gulf Fritillary Caterpillar

Gulf Fritillary Caterpillar

Hi Resa,
Thanks so much for adding to our archive again by filling in a species that didn’t get much recent documentation.  We probably haven’t posted an image of a Gulf Fritillary Caterpillar since before our major site overhaul and migration over two years ago.

What's That Bug? does not endorse extermination

DANGER: Mexican Flannel Moth Caterpillar

WTB Saves Our Vacation!

flannel cat mexico don 300x210 DANGER:  Mexican Flannel Moth Caterpillar

Stinging Flannel Moth Caterpillar

WTB Saves Our Vacation!
September 23, 2010
Hello Daniel,
(I’ve tried to send this note before, so ignore it if you’ve received an earlier version.)
In February of this year, my wife and I visited Isla Mujeres, an island just off Cancun.  I was thrilled when my wife discovered a caterpillar on the Sea Grape hedge near our hotel.  But something about it seemed familiar, and threatening.
Sure enough, I was recalling a WTB post a year earlier, February 2009, filled with frightening infomation about this exact species of Flannel Moth caterpillar, on the very same island!
As your fans start dreaming of a vacation in the tropics, I’d like to caution them to be wary of critters they don’t know.  My wife wanted to touch this caterpillar, and that could have been real trouble.  (I did let her lightly brush her fingers over the ends of the long hairs, but not the nasty shorter bristles.)
Sea Grape is a beautiful and very common shrub/tree there, and is frequently used in landscaping.  The local hotel staff doesn’t warn guests, and the caterpillars are attractive, at least to bug-nuts like me and my wife.
The caterpillars were in the later stages of development when we were there in mid-February, and some were spinning their cocoons.  It may be that there are several generations in the course of a year, so be on guard whenever you’re there.  They are wonderful subjects for photos, and they’re not going to attack you.  It’s look-but-don’t-touch.
Thank you WTB for your excellent work, and for saving our vacation!
Don J. Dinndorf
St. Augusta, MN

flannel cat mexico don 2 300x206 DANGER:  Mexican Flannel Moth Caterpillar

Stinging Flannel Moth Caterpillar

Dear Don,
We did not receive your previous emails, or we overlooked them, so we are very happy you resent.  We are also pleased to hear our humble service was able to contribute to your pleasant vacation.  The stinging Mexican Flannel Moth Caterpillar in the genus
Megalopyge, which has been documented on our website in the past, might be one of the worst stinging caterpillars in the world.  Your excellent photos are greatly appreciated and we hope we are able to help other tourists to Mexico and Central America with this information.

flannel cat mexico don 3 300x217 DANGER:  Mexican Flannel Moth Caterpillar

Stinging Flannel Moth Caterpillar spins cocoon

White Marked Tussock Moth

Not sure what this is
Location:  Mid-Atlantic, Delaware
September 22, 2010 10:13 pm
Found this critter exploring our garden pot on our back deck today (9/22/10). I’ve never seen a caterpillar with antennae like that or with those things along its back. Any idea what this is?
Signature:  Brian

white marked tussock cat brian 300x197 White Marked Tussock Moth

White Marked Tussock Moth

Hi Brian,
This is a White Marked Tussock Moth Caterpillar,
Orgyia leucostigma, or another member of the genus.  You may find additional information in our archives and on Bugguide.

What's That Bug? does not endorse extermination

Variegated Fritillary Chrysalis

Pupae in Graveyard
Location:  Lancaster, PA
September 20, 2010 6:33 pm
We found a couple of these gorgeous pupae attached to grave stones. The photos were taken in mid September. I was hoping you could help with identification.
Signature:  Jen

variegated fritillary chrysalis jen 300x218 Variegated Fritillary Chrysalis

Variegated Fritillary Chrysalis

Dear Jen,
Your pupa is the chrysalis of a Variegated Fritillary.  Because the caterpillars feed on a large variety of plants, they are a wide ranging species in open fields and along roadsides.  According to BugGuide:  “Larvae feed on Passionvine (Passiflora), Violets & Pansy (Viola, Flax Linum, Moonseed (Menispermum), Mayapple (Podophyllum), Stonecrop (Sedum), Purslane (Portulaca) and others. Adults are fond of flowers, and especially seem to like Thistles and yellow Composites. They also frequently visit damp ground.

Bagworm from Mexico

Metamorphosizing Bug in Puerto Vallarta, Mexico?
Location:  Puerto Vallarta, Mexico
September 12, 2010 3:23 am
Hi Bugman!
First and foremost, I wanted to say that I think what you’re doing here as an educational (or shall we say, ”ent”ucational!) service is awesome! I truly hope that you achieve the dream of meeting up with Martha one day and I’m pulling for you! Secondly, I was hoping you could identify this bug which was sighted by my twin sister during her brave, charitable, summer journey via bicycle from Arizona all the way to Panama. It was found metamorphosizing or perhaps laying eggs, as it remains unclear to the layman viewer what exactly is happening, although I suppose one would think as a ”layman”, I could at least identifying egg laying properly. Please excuse the bad pun, and I hope that doesn’t hurt my chances of getting this enigma identified! So, in your expertise, what is going on in this picture, and by which kind of bug? Your knowledge and eagerly anticipated response is greatly appreciated! Thank you!
Signature:  Paco and Brunilda

bagworm oiketicus paco brunilda 300x218 Bagworm from Mexico

Bagworm

Urgent ID priority escalation! Re: Identification Request: Metamorphosizing Bug in Puerto Vallarta, Mexico?
September 20, 2010  11:50 AM
Hello again Bugman!
Perhaps it was the letter riddled with awful puns the first time or just the mere fact that you are a staff of single digits fielding an onslaught of mail from the masses on a daily basis, however, I have yet to receive a response from my original inquiry below, and in light of this, I wanted to provide an update regarding the request.  In the event that the puns were the turn-off in the first place, I hesitate to apologize for “bugging” you, as this will certainly not help my chances of getting some closure on this insect any time soon, but I am sorry for disturbing you, as you are a busy guy, especially with the release of the new book which I can’t wait to get my hands on!  (No, honestly, I mean that, and this was not said in hopes of getting my question answered sooner, I promise.  But does it help?)  Okay so to make a long story short, although it looks as if we’re too late for that, the identification of this bug is the subject of a heated bet, in turn, escalating the urgency of this request, as it’s not just any bet…it’s a bet with a guy who always has to be the one to know it all.  He cannot stand being wrong, and no matter what, he insists on being right, and the most unfortunate part for the rest of us is that he IS RIGHT most of the time.  He claims that the insect appearing in our photo is a queen termite laying her eggs, however, to be quite honest, we’re not so sure about that, and think we may have finally entrapped Mr. Trivia into admitting he is human and fallible!
He wanted me to assert what I thought it was, however, I have held him at bay merely by telling him that it’s NOT THAT.  I’m running out of time, however, in committing to an actual answer, as he keeps probing for a more definite response.  Now, of course, if you do indeed identify it as being a queen termite laying eggs, then I will quietly thank you, and hope that he doesn’t stumble upon “What’s That Bug” for more ego stroking satisfaction that we certainly don’t need to see!  Though, should our bug turn out to be something NOT of the termite family, then we can consider this a win-win, as I revel in proving him wrong, and you would shortly receive an incredible spike in web traffic, as there are legions of us who would like to see that just once, Mr. Trivia hiccuped with an answer!  Just to be clear, the bet is a friendly one of no material value made between rivals, and there is no money being changed hands here, nor is someone going to lose a house, car, or spouse as a result of high stakes betting.  So, the pressure is off, Bugman, in terms of being responsible for someone’s life going down the tubes in response to a bug identification, however, let us not underestimate the value of being able to reference this slip up on his part, basking in eternal glory from the point of a non-termite identification, on!  Thank you again for your consideration to elevate the priority of this review!
Sincerely,
Paco and Brunilda

Dear Paco and Brunilda,
Collect your debt.  This is no termite, queen or otherwise.  It is a Caterpillar, more specifically a Bagworm in the family Psychidae.  Bagworms are known for constructing bags from silk and bits of plant material from their food plants, like leaves, stems and conifer needles.  We were not familiar with any Bagworms that make strictly silken bags, so we turned to BugGuide and found an example from Arizona in the genus
Oiketicus that looks very similar to your Bagworm.  Since insects do not respect international borders, it may be the same genus as your example.  Sorry for the delay, but we can only answer so much mail.

Hi Daniel!
Thank you so much for taking the time to identify the little border crossing Bagworm who I suppose didn’t want to stick around to see what ultimately would come of the Arizona SB 1070 Immigration Laws (SB standing for Suspicious Bagworm, of course), if he/she was on the run (or as much as this little critter can try, anyway)!  We cannot tell you how liberating it feels to finally conquer Mr. Trivia in what, at times, became a rather bugly battle of aggressive words, and thanks to you, the win was literally in the BAG!  I’ll stop with the “pun”ishment now, I promise.  Thanks again, and best of luck in the future with all your endeavors!
Paco and Brunilda

Sycamore Tussock Moth Caterpillar

Sycamore Tussock Moth Caterpillar?
Location:  Suburb North of Atlanta, GA
September 20, 2010 9:28 am
Thanks to your site I think I’ve identified this as a Sycamore Tussock Moth Caterpillar. We’ve seen many of these all over the place this summer. They’re hard to photograph; they don’t like to be still.
Also I’ve seen something very similar to this but with more black than orange hairs spiking out. Is it a variation of the same creature?
Signature:  Resa

sycamore tussock cat resa 300x228 Sycamore Tussock Moth Caterpillar

Sycamore Tussock Moth Caterpillar

Hi again Resa,
We are quite happy to hear that you successfully self identified your Sycamore Tussock Moth Caterpillar,
Halysidota harrisii, which is profiled on BugGuide.  The closely related Pale Tussock Moth or Banded Tussock Moth, Halysidota tessellaris, has a caterpillar with black tufts instead of orange tufts and it also is a local species for you.  It is also profiled on BugGuide.

Prometheus Moth Caterpillar

Unknown Silkworm with Tramp Stamp
Location:  Suburb North of Atlanta, GA
September 20, 2010 8:40 am
Your site has fed a hidden fire in me for a love of bugs. I commonly find myself crouched over colorful insects snapping pictures or discussing the creature with friends and neighbors…and strangers. :/ My reputation even led to the neighbors walking over Saturday to share their find. My 9yo believes this to be an early luna moth instar but I wasn’t sure if that was the right identification. I couldn’t find any images online that exactly matched this fat green guy. Can you help us? He’s about two inches long. I’ve included pictures of a close up on its ugly light colored face, its front, stumpy and back, sucker legs. So cool by the way! Are the back legs truly suckers or are those fine hairs I think I see that make the legs act like the mouth of a venus fly trap? My 4yo neighbor was just as enthralled as I was watching the back legs open and close. But I ramble…another picture I’ve included is of the awesome tramp stamp mother natur e gave this silkworm…a smiley face on it’s backside. Love it.
Thanks for all you do, bugman. You’ve helped us many, many times and hopefully you can let us know if my 9yo was correct or if this was something completely different.
Update: Looks like I can only include three pics, so I won’t be sending the ugly mug. If you need it for identification, let me know. The legs and tattoo are much more interesting.
Signature:  Resa

promethea cat resa 300x164 Prometheus Moth Caterpillar

Prometheus Moth Caterpillar

Hi Resa,
Your caterpillar is a Spicebush Silkmoth, also known as a Prometheus Moth or Promethea Moth,
Callosamia promethea, which we identified on BugGuideWe got a chuckle when you said you were attaching a closeup of the caterpillar’s head, because your photo is actually its rump.  Then we noticed your update that you were not attaching the head photo.  More information on this lovely moth can be found on BugGuide.

promethea cat rump resa 300x244 Prometheus Moth Caterpillar

Rump of a Prometheus Moth Caterpillar

Sphinx Caterpillar: Eumorpha achemon

big white colorado caterpillar
Location:  fort collins, colorado
September 18, 2010 11:49 am
We found this rather large caterpillar half buried in sand. Both ends of him look like heads, but i believe that his head is the flat end. I couldn’t find him on your website, and we were wondering what he is. He is about three inches long.
Signature:  Thank you, Patrick

eumorpha cat patrick 300x185 Sphinx Caterpillar:  Eumorpha achemon

Sphinx Caterpillar

Hi Patrick,
We have tentatively identified your caterpillar as one of two possible species in the genus
Eumorpha.  BugGuide has a photo that looks nearly identical, and it is identified as the Typhon Sphinx, Eumorpha typhon, but Bill Oehlke’s excellent Sphingidae website does not list the species in Colorado, though it is found in Arizona.  We needed to verify the location of Fort Collins on a map to see how close it is to Arizona, and we discovered is is in the north, not the southwest corner which would more thoroughly support our identification since insects really tend to ignore state and national borders.  The similar looking caterpillar of the Achemon Sphinx, Eumorpha achemon, is found in Colorado according to Bill Oehlke’s Sphingidae of the Americas website, and this species has a greater range.  So, though logic tells us that this must be the caterpillar of the Achemon Sphinx, we cannot totally disregard that it may be the Typhon Sphinx without contacting Bill Oehlke, so we are copying him to get his opinion.

Daniel,
It is Eumorpha achemon which is the only Eumorpha in North America that has the side panels appearing as if they are twisted dough (i.e. segmented but still continuous).
I will ask Patrick for a larger image and permission to post it to a webpage.
Bill Oehlke


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