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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

What's That Bug? does not endorse extermination

Bagworm

Curious, spectacular cocoon
Location:  South Florida
September 1, 2010 9:15 pm
I found this in my crepe myrtle tree about two weeks ago. It’s a stunning piece of work, but I’ve never seen anything like it before. Even my colleague, a caterpillar/moth/butterfly guru, has never seen the likes of it and pronounced it ”spooky.” It’s between 2-3 inches long. What made this?
wilmax

bagworm wilmax 261x300 Bagworm

bagworm

Hi wilmax,
This cocoon was made by a Bagworm, the caterpillar of a moth in the family Psychidae.  As a caterpillar, the Bagworm spins a shelter from silk and organic matter from the plants upon which it feeds.  It drags the bag around while it feeds, never leaving its shelter.  It then uses the bag to pupate, the stage depicted in your photograph.  Adult Bagworm moths are sexually dimorphic.  The males are winged and the females lack wings and legs and do not leave the shelter of the bag once mature.  After mating, the female lays her eggs in the bag and after hatching, the young caterpillars disperse, each spinning its own bag which is enlarged as the caterpillar grows.

Thank you!!  Thanks for choosing to feature the photo on the site. I see that you have had many similar questions in the past – I wish I had known where to start looking.

Bagworm

Unknown bug on my car
Location:  Central Ohio
August 10, 2010 8:06 am
Hi my name is Vernoica Pence and I live in Hilliard Ohio. I came home from work and found an unknown bug on my boyfriends car. I have never seen a bug like this ever and I am an outdoor person. I was hoping if you could tell me what kind of bug it is.
Veronica Pence

bagworm veronica 159x300 Bagworm

Bagworm

Hi Veronica,
We are going to give you the part of the response we just gave Michele who wrote in with a related Bagworm.  This is a Bagworm in the family Psychidae.  Bagworms are moth caterpillars that fashion a bag from the foliage of the plants they feed upon.  Bagworms will migrate away from the food plant to find a suitable place for pupation, and they pupate inside the bag.  The males of the species fly but the females are legless and wingless and do not leave the bag.  After mating, the eggs are laid inside the bag to begin a new generation.  We actually believe your species is the Evergreen Bagworm,
Thyridopteryx ephemeraeformis, which you may read about on BugGuide.

1

What's That Bug? does not endorse extermination

Bagworm

bug that looks like dead hibiscus flower
Location:  Dallas/Ft. Worth Texas
August 10, 2010 9:09 pm
I found this caterpillar? slowly moving up my door jam in Texas and had never seen anything like it. Could you possibly identify it. I didn’t disturb it so I’m not sure if it is a flying or crawling bug. It moved up the door jam over several hours time. Thanks! Michele
Michele Bennett

bagworm michelle 282x300 Bagworm

Bagworm

Hi Michele,
This is a Bagworm in the family Psychidae.  Bagworms are moth caterpillars that fashion a bag from the foliage of the plants they feed upon.  Bagworms will migrate away from the food plant to find a suitable place for pupation, and they pupate inside the bag.  The males of the species fly but the females are legless and wingless and do not leave the bag.  After mating, the eggs are laid inside the bag to begin a new generation.

Daniel,
Wow! Thanks for your quick response.  I was fascinated by “it” but now I realize I will need to kill it or it will continue to ruin my hibiscus plant right outside my front door.  Thanks again.  What a great site and service you have.
Michele

Bagworm

Destructive Catepillar – NJ
Hi,
This Catepillar took down an Arborvite in a matter of days.  Their cocoons have blown all around in the wind and they are spreading fast.
Can you tell me what we are dealing with here, Southern NJ, zip 08086…
Kevin

bagworm kevin 300x239 Bagworm

Bagworm

Hi Kevin,
This is a Bagworm in the family Psychidae.  The caterpillars of the Bagworms construct a protective covering from plant material, generally the plant material that they feed upon.  In the case of your photograph, that is probably the leaves of the Arborvite.  You can read more about Bagworms on BugGuide where the life cycle is briefly described as:  “
Larvae (bagworms) construct spindle-shaped bags covered with pieces of twigs, leaves, etc., and remain in them — enlarging the bags as they grow — until they pupate (also in the bag). Adult females remain in the bag, emitting pheromones which attract adult males to mate with them.  Eggs are laid inside the bag, and when they hatch the larvae crawl away to begin construction of their own individual cases.

Mystery: Bagworm (we think) from Oman

What bug had made this?
May 23, 2010
I clicked this picture thinking it was a screw.. Then someone corrected me saying that its probably an insect which makes a cocoon out of twigs. Can you tell what it really is… ‘coz its definitely not a screw that I shot!
brinda
Muscat, Oman

bagworm oman brinda 300x234 Mystery:  Bagworm (we think) from Oman

Bagworm we believe

Hi Brinda,
The only conclusion we can draw is that this must be some species of Bagworm, a group of moths in the family Psychidae.  Many North American species are represented on BugGuide.  We decided to search online in an effort to be more specific with your individual.  The closest we found is a Bagworm from Singapore with a bag construction similar to your example, but with an interesting twist.  Some photos are on a Blog about Singapore (scroll about 3/4 way down) and one of the photos is also posted on Flickr.  Bagworms begin constructing a bag when they are young caterpillars, adding to the bag as they grow.  The bag acts as a means of shelter and protection and the caterpillar does not leave the bag, eventually pupating inside.  The bag is constructed from silk and plant material, generally from the plant upon which the caterpillar feeds.  Many female Bagworms are wingless and legless, and they never leave the shelter of the bag.  The male seeks the female out when she is sexually mature and mates either inside the bag or in the entrance to the bag.  Perhaps one of our readers will have better luck identifying the species for us.

Hey,
Thanks a bunch.. I did a bit of research myself on bagworms..but still a bit lost on which type is this one. Most of them are on leaves or branches, but this one was on a concrete block on the side of a road.
I’m going to try and dig a bit more on bagworms in Oman.
Thanks again!
Regards
brinda

Bagworm from New Guinea

Bagworm in Papua New Guinea
April 30, 2010
Dear Bugman,
Last week we found this “thing” on the ground, presumably having fallen out of a tree. We took it home and laid it on a shelf outside our house. The next day, it had attached itself to this jar. We have, thanks to your site, identified it (her?) as a bagworm, but as her “bag” is a good eight inches (8″) long, we thought you might like to see her! As for the season, well, it’s just about always the same here. But it is just now transitioning from rainy season to dry season here. Thanks for helping us identify her! She’s a beauty!
We are curious, too, about the grub in picture three. The coin is about the size of a quarter, so it’s a big one. Any idea what it becomes? Thanks!
Sharon
Papua New Guinea

bagworm new guinea sharon 229x300 Bagworm from New Guinea

Bagworm

Hi again Sharon,
What a gorgeous Bagworm.  We will try to identify the species.  The grub is a Scarab Grub, probably a May Beetle.

bagworm new guinea cu sharon 300x203 Bagworm from New Guinea

Bagworm

Mystery Caterpillar from Costa Rica similar to Bagworm

mysterious large cocoon with a caterpillar inside.
April 5, 2010
I found him on the ground in my yard in Costa Rica. I brought it inside to hatch, but he just comes partially out to eat and poops round pellets out of the bottom, and spends most of his time inside. I have had him for about 5 days now. He has moved about to different locations, until i found a place he likes with leaves he likes to eat. He attached himself to a branch i provided with a small silk thread, and has remained there.
Is it normal for a caterpillar to continue to eat after spinning a cocoon, or is this his protective living space? Will it eventually pupate?
Jan Betts
Costa Rica, Central America 3000 feet altitude.

bagworm costarica jan 300x225 Mystery Caterpillar from Costa Rica similar to Bagworm

Bagworm

Dear Jan,
We intended to post your photo two days ago, but we got distracted.  The number of letters that are arriving each day has drastically risen since the first of April, and it is becoming impossible to even respond to a small fraction.  Your submission is so unusual, and we are hoping one of our readers, perhaps Karl who just returned from Costa Rica, will be able to assist with this creature.  Normally, we would think that a caterpillar of this kind would be a Bagworm, but we don’t believe that is the case here because Bagworms generally incorporate plant material in their bags.

bagworm costa rica 2 jan 225x300 Mystery Caterpillar from Costa Rica similar to Bagworm

Bagworm

Do you know the plant it is feeding upon?

bagworm costarica 3 jan 300x204 Mystery Caterpillar from Costa Rica similar to Bagworm

Bagworm

Daniel:
I initially thought this might be a Sack-bearer Moth (Mimallonidae) but the caterpillar itself just doesn’t look right. I am therefore going back to the Psychidae (Bagworm Moths), some of which look very similar to the caterpillar in Jan’s first photo. I can’t be certain about a more specific identification but I think the genus may be Oiketicus, possibly O. kirbyi which is widespread throughout the tropical Americas and Caribbean. Assuming that it is O. kirbyi, the caterpillars do incorporate plant material into their bags as you indicated, but in this case the silk that binds the material together often envelopes the bag entirely. The result is a “lumpy” looking bag, much like the one in Jan’s photos.  Females in the genus never leave their bags (except to die) and don’t develop wings, so Jan may be disappointed if she is expecting a winged moth to eventually emerge (unless it is a male). Oiketicus kirbyi has caused some problems in Costa Rica and other places as an agricultural pest. Regards.
Karl


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