Currently viewing the category: "Hornworms"
What's That Bug? does not endorse extermination

Subject:  Caterpillar
Geographic location of the bug:  Dallas Texas Area
Date: 01/06/2020
Time: 01:51 PM EDT
Your letter to the bugman:  I found this guy on one of my Vitex bushes this Fall.  He is 3″ long. What is he going to be?
How you want your letter signed:  Clueless in Dallas

Hornworm: probably Manduca florestan

Dear Clueless in Dallas,
This is a Hornworm, the caterpillar of a moth in the family Sphingidae.  Thanks for providing the food plant.  When we searched for Sphingidae caterpillars that feed on Vitex, we found this posting for
Manduca florestan on Wikipedia, and we then checked on Sphingidae of the Americas where we found images that appear to match your individual.  Manduca florestan is listed as a stray in Texas.  We will contact Bill Oehlke to verify our identification.

What's That Bug? does not endorse extermination

Subject:  A Different Kind of Caterpillar
Geographic location of the bug:  Lexington, Massachusetts USA
Date: 10/14/2019
Time: 03:03 PM EDT
Your letter to the bugman:  Dear Bugman,
I spotted this unique guy while walking my dog this morning.  Could you please identify him for us?
Thank you!
How you want your letter signed:  Sincerely, Tracey Hynes

Bedstraw Hawkmoth Caterpillar

Dear Tracey,
We identified this Hornworm from the family Sphingidae as the Bedstraw Hawkmoth Caterpillar,
Hyles gallii, thanks to images on Sphingidae of the Americas.

What's That Bug? does not endorse extermination

Subject:  Varition of Morocco horned caterpillar color
Geographic location of the bug:  Closest to Erfoud, Morocco
Date: 10/08/2019
Time: 10:49 AM EDT
Your letter to the bugman:  Hello BugMan! I wanted to show you this variation in color of the (perhaps) Barbary Spurge? Hornworm.(OR tell me the exact ID; I see some with two dots!) We found these while riding camels in Erg Chebbi sand dunes on the vegetation shown. We gently tickled one and put him on a leaf to better photograph. Then we put him back on leaves. There were LOTS of them! They can make their way quite fast over the sand when looking for another bush! I took the photos on September 26, 2019. Thank you!
How you want your letter signed:  Cynthia S.

Hornworm from genus Hyles.

Dear Cynthia,
This hornworm is definitely from the genus Hyles, but we cannot be certain of the species.  It does look most to us like the Barberry Spurge Hawkmoth caterpillar pictured on Sphingidae of the Western Palaearctic.

What's That Bug? does not endorse extermination

Subject:  Large green caterpillar
Geographic location of the bug:  Bangor ME
Date: 09/19/2019
Time: 06:53 PM EDT
Your letter to the bugman:  Found this caterpillar walking across the driveway toward the grass.  Having trouble identifying it.  Would appreciate your help.
How you want your letter signed:  PH

Modest Sphinx Caterpillar

Dear PH,
This is the caterpillar of a Modest Sphinx or Poplar Sphinx,
Pachysphinx modesta, and we identified on Sphingidae of the Americas where it states:  ”  These hornworms feed upon poplar, willow, and cottonwood, are very strong and develop to quite a size.  Larvae progress very rapidly on poplar. The green of the early hornworm instars is very much like the top of the poplar leaf while the pale green of the final instar more closely resembles the color of the underside of poplar leaves.  Larvae are extremely strong with powerful mandibles.”  The caudal horn on the Modest Sphinx Caterpillar is quite insignificant compared to the horns of other caterpillars in the family.

What's That Bug? does not endorse extermination

Subject:  What caterpillar and moth or butterfly will this be
Geographic location of the bug:  Chapala, mexico
Date: 09/15/2019
Time: 03:40 PM EDT
Your letter to the bugman:  My friend sent me a pic of this caterpillar from Chapala Mexico. After looking online I found hornworm caterpillars. Which one is this and what moth or butterfly does it turn into. Also what is the purpose of the horn?
How you want your letter signed:  Sarah

Unknown Hornworm

Dear Sarah,
We are very confident that this is a Hornworm in the family Sphingidae, and that it will eventually transform into a Sphinx Moth or Hawkmoth, but alas, we have not been successful identifying its species despite the excellent database on Sphingidae of the Americas.  We will write to Bill Oehlke to see if he can provide a species identification.

Bill Oehlke Responds.
Hi Daniel, I think I have seen that one before, but a quick check did not let me come up with an id. Later this afternoon I will send it to Jean Haxaire to see if he knows what it is.
Bill

Daniel,
Jean Haxaire has indicated Isognathus rimosus inclitus.
I wish permission to post it to website. Please check with photographer and forward his or her name.
Bill

Ed. Note:  The subspecies Isognathus rimosus inclitus is pictured on Sphingidae of the Americas, but there is no larval image.  We are writing back to Sarah with the identification and a request from Bill Oehlke to include the image on his comprehensive site.

Hi Daniel,
Thanks so much. I’m checking with my friend and am getting an exact location if possible. I’m sure she’ll be alright with sharing, but will get back to you tomorrow.
Sarah

Hi Daniel,
Pilar Martinez is the photographer and the pic was taken in Chapala, Jalisco , Mexico
Pilar has said ok to sharing the image. I’m copying her on this email.
Thank you so much for the identification and glad to contribute to the database.
Please send us a link when it’s up.

Thanks Sarah and Pilar,
Pilar’s image is already live on What’s That Bug? and Bill Oehlke will post it to the species page for
 Isognathus rimosus inclitus on his site, Sphingidae of the Americas, where he has adult moths of  pictured, but no caterpillars.

Bill Oehlke’s website:
Hi Daniel,
Please say thanks to Sarah and Pilar for me and let them know Isognathus rimosus inclitus image has been posted to
http://www.silkmoths.bizland.com/Sphinx/irimoinc.htm
Bill Oehlke

What's That Bug? does not endorse extermination

Subject:  What is this chunky boy?
Geographic location of the bug:  Southern Utah, Kane County
Date: 08/22/2019
Time: 01:29 PM EDT
Your letter to the bugman:  Hi! I’ve have looked and looked but cannot definitively identify this caterpillar I found a couple days ago. It was in a cottonwood tree. My first thought was a tomato hornworm but the side spots and horn seem too different. Thoughts?
How you want your letter signed:  D. E.

Big Poplar Sphinx Caterpillar

Dear D.E.,
Though this is not a Tomato Hornworm, it is a different species of Hornworm from the family Sphingidae.  We believe it is the Big Poplar Sphinx caterpillar based on the species found Sphingidae of the Americas Utah page.  According to Sphingidae of the Americas:  “Larvae feed on cottonwood and poplar (
Populus) and willow (Salix).”

What's That Bug? does not endorse extermination