Large green/yellow hornworm?
September 17, 2009
I noticed that our forsythia plant appeared to have died, but upon closer inspection, found a large yellow/green critter on it. Can you help me Identify the caterpillar?
Brian
rock hill south carolina

Rustic Sphinx Caterpillar
Hi Brian,
We looked at all the possible Sphinx Caterpillar candidates found in South Carolina on Bill Oehlke’s website before deciding that the Rustic Sphinx, Manduca rustica, is the likeliest possiblity for your individual. The real decisive factor is the food plant forsythia. Forsythia is in the olive family Oleaceae, and the Rustic Sphinx Caterpillar feeds on the leaves of plants in that family.
¶ Posted 18 September 2009 § ‡ ° Caterpillar
September 14, 2009
Found this guy about 2 years ago in Cleveland, Ohio Metroparks system. Gates Mills, Ohio to be exact. It was early fall and I found him sitting on a picnic table. I’ve tried to find his picture on the web but have not had much luck.
What is he?
Judy
Northeastern Ohio

Catalpa Sphinx Caterpillar
Hi Judy,
This is the dark form of the variable caterpillar of the Catalpa Sphinx, Ceratomia catalpae, which can be seen on Bill Oehlke’s wonderful website.
Thank you soooo much…I hate having a picture of something and not knowing what it is!
Take care!
¶ Posted 14 September 2009 § ‡ ° 4-5 inch worm/caterpillar
September 10, 2009
This was found in my sisters yard and we were just wondering what it was. We have never seen anything like this around here before. dont know how well the pictures will come out but its green with what looks like some reddish brown triangle shapes all along its back. it has very tiny spikes on its head and what looks like a hook that is very hard on the opposite end of it. its about 4-5 inches long and about the thickness of a cigar. when it was picked up with a plastic spoon it tried to stab the spoon with the “hook”. so maybe a little aggressive.
Cristin Morvant
Louisiana, USA

Waved Sphinx Caterpillar
Hi Cristin,
This is a Sphinx Moth Caterpillar, known as a Hornworm. It is most likely a Waved Sphinx, Ceratomia undulosa. The green caterpillar, according to Bill Oehlke, takes on a rosy hue prior to pupation.
1
¶ Posted 11 September 2009 § ‡ ° What kind of butterfly or moth is this caterpillarit?
September 10, 2009
We have a buttlerfly garden and while weeding in an overgrown area we came across several blue green on top and green on underside caterpillars. They had 1 horn on the tail that is not deadly and when touched, it was soft not hard. Has single yellowgreen strip down each side with strip becoming white as it nears head area on sides. Has 2 small black spots encircled in yellow/white on upper back with a red spot on the side next to each black spot. Measures 3.5 – 4.0 inches. No fur, very smooth skin texture. No ripples or contours on body. We searched our field guide and the web with no results. Also posted picture on face book with no positive results.
Any help would be appreciated., Thanks, Ken Jewett
South Florida, United States

Ello Sphinx Caterpillars
Hi Ken,
These are Sphinx Moth Caterpillars in the genus Erinnyis, most probably Erinnyis ello, the Ello Sphinx, based on photos on Bill Oehlke’s awesome website. We would not entirely discount the possibility that it might be Erinnyis alope, also pictured on Bill Oehlke’s website. Sphinx Moth Caterpillars are called Hornworms. Here is a list of food plants that Bill Oehlke associates with the Ello Sphinx: “Larvae feed on papaya (Carica papaya) in the Caricaceae family and on Cnidoscolus angustidens and other plants in the spurge family (Euphorbiaceae) including poinsettia (Euphorbia pulcherrima), guava (Psidium species) in the myrtle family (Myrtaceae) and on also saffron plum (Bumelia angustifolia/Bumelia celastrina) in the Sapotaceae family. : EUPHORBIACEAE. Manilkara bahamensis has also been reported as a host as have Willow Bustic (Bumelia salicifolia) and Painted Leaf (Poinsettia heterophylla).“
¶ Posted 11 September 2009 § ‡ ° Orange-Red Caterpillar with horn
September 7, 2009
Hi,
We found this in the yard today. I believe it is some type of Hornworm, but I can’t find any hornworms that are orange or red. It is currently munching on the leaf from an Ash tree.
Carrin W.
SE Michigan

Northern Ash Sphinx Caterpillar: early instar
Dear Carrin,
Based on the food plant you indicated, we are guessing that this might be the caterpillar of the Northern Ash Sphinx, Sphinx chersis. It is an early instar, meaning its appearance can change greatly. Bill Oehlke’s Northern Ash Sphinx page does not show early instar larvae. We will copy Bill Oehlke on this response to see if he can clarify the species.
Daniel,
I think you might be correct! I look forward to Bill’s response.
Carrin
Daniel,
Yes it is the ash sphinx which can be quite red or green in various instars. Edna Bottorff of Oregon, recently sent me images of earlier instars showing red and green forms and I will post them shortly.
Bill Oehlke
¶ Posted 08 September 2009 § ‡ ° Unknown caterpillar
September 3, 2009
Hi, I found this really weird looking caterpillar in my birch tree. I have never seen anything like it in my life. It is green with 2 sets of horns toward the front of its head and has 1 horn at the end of its body. It blends in with the leaves and has what appears to be a leafs vein running up it’s back. I searched for something like this online and the closest thing I found was the lime hawk moth caterpillar. Is that what this is?
Denise-MA
Massachusetts

Four Horned Sphinx Caterpillar
Dear Denise-MA,
According to Bill Oehlke’s wonderful website, the Four Horned Sphinx, Ceratomia amyntor, is also called the Elm Sphinx, and its food plants include: “Elm (Ulmus), birch (Betula), basswood (Tilia), black locust (Robinia pseudoacacia) and cherry (Prunus). There are chocolate-brown to orangey-brown, sometimes with a pinkish tint, and green forms of the larvae. The common names are derived from foodplants (Elm Sphinx) and the structure (Four-horned Sphinx) of the larva.“ We are impressed that you were able to locate this well camouflaged Four Horned Sphinx Caterpillar that matches the leaves of the birch tree so well. We are copying Bill Oehlke on this response so he can add your sighting to the comprehensive data he is compiling on species distribution.

Well Camouflaged Four Horned Sphinx Caterpillar
¶ Posted 05 September 2009 § ‡ ° What is this caterpillar
August 24, 2009
I live in Western Newfoundland. My grandson found the attached caterpillar in his back garden. what abeauty…The “horn” is at the back end. I put is in a container and addedafew shrub leaves which is quickley began to feed on. I’ve since given it its freedom (I may be sorry :O)
Keith P.
Wetsern Newfoundland, Canada

Laurel Sphinx Caterpillar
Hi Keith,
This beautiful caterpillar is a Laurel Sphinx, Sphinx kalmiae. We quickly located it on Bill Oehlke’s awesome website.
Thank you for your prompt reply and interesting literature. It certainly is a very beautiful creature. I’m in deep trouble with my wife if it decides to breed in the garden – we have Lilac L
Keith Piercey
Corner Brook
Hi again Keith,
WE will try to get you off the hook in the interest of preserving your marital bliss. Though a large Sphinx Caterpillar can consume a considerable quantity of leaves, this does not do lasting damage to the plant. By the time your Sphinx Caterpillars appear in a given year, the lilacs have finished blooming. We doubt that there would ever be more than a few Laurel Sphinx Caterpillars on a given lilac. Some moths lay all their eggs in one location, but Sphinx Moths tend to be more selective, and place single eggs on distant leaves.
¶ Posted 25 August 2009 § ‡ ° Giant Caterpillar
August 22, 2009
Found in the garden on 12.12.08. Approx 10cm Long and 1.5cm dia.
Can you identify it and tell me what it has by now become? We put it over the wall onto an adjacen vacant plot of land. Haven’t seen any more
Roy
Gurgan, India

Oleander Hawkmoth Hornworm from India
Dear Roy,
This is a Sphinx Moth Caterpillar or Hawkmoth Caterpillar in the family Sphingidae. These caterpillars are often called Hornworms for obvious reasons, and they are harmless. The coloration of your specimen indicates that it was probably getting ready to pupate, which they do underground. We will put in a quick inquiry with Bill Oehlke to see if he recognizes the species, and perhaps one of our readers will write in with a species identification.
Identification courtesy of Karl
August 24, 2009
Hi Daniel and Roy:
This looks like the caterpillar of the Oleander Hawkmoth (Daphnis nerii). It is native to southern Europe, Africa and Asia but is popping up worldwide as its host plant (Oleander) is spread as a popular ornamental. They are apparently well established in Hawaii for instance. The mature larvae are usually green but it does come in a variety of color variations; this is a brown form. The adults are very well represented on WTB and there has been at least one posting of a brown form caterpillar. Regards.
Karl