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

Subject:  What are these caterpillars
Geographic location of the bug:  Selma, texas
Date: 11/02/2018
Time: 05:02 PM EDT
Your letter to the bugman:  I found these caterpillars on a potted plant I had.  They have eaten almost all the leaves that I can’t remember what kind of plant it was.  I’m almost sure it was an Impatien.   I think they’re the same caterpillar but not sure.  What are they?
How you want your letter signed:  Delia

Tersa Sphinx Caterpillars

Dear Delia,
These appear to be the caterpillars of the Tersa Sphinx, which occurs in both green and brown forms.  Are you sure the plant was
Impatiens?  A preferred food plant for the Tersa Sphinx is Pentas, according to Sphingidae of the Americas.

Tersa Sphinx Caterpillar

Daniel,  thank you for your quick response.  You’re correct,  these were Pentas.  I just couldn’t remember what kind of plant it was
Delia

What's That Bug? does not endorse extermination

Subject:  caterpillar ID
Geographic location of the bug:  St Petersburg FL
Date: 10/27/2018
Time: 02:03 PM EDT
Your letter to the bugman:  Hi, I was just hoping you might be able to help me identify this large caterpillar found on my fence this morning
How you want your letter signed:  Thanks, NAS

Unknown Hornworm

Dear NAS,
This is a Hornworm, the caterpillar of a Sphinx Moth in the family Sphingidae, but we are uncertain of the species.  Though your individual reminds us of the Hornworm of a Ficus Sphinx, it is not one of the typical color variations we see in that species.  Perhaps one of our readers will be able to provide a species identification

Unknown Hornworm

Update:  November 1, 2018
We received several comments indicating this is a member of the genus Erinnyis, and Cesar Crash provided this BugGuide link to the Alope Sphinx larva.

What's That Bug? does not endorse extermination

Subject:  Gorgeous Caterpillar
Geographic location of the bug:  East Central Indiana Winchester
Date: 09/18/2018
Time: 03:09 PM EDT
Your letter to the bugman:  Hi Bugman,
I found this guy in the parking lot of my office. We are located near a small creek with some brush. I was hoping you could help me identify this bug!
How you want your letter signed:  Ann

White-Lined Sphinx Caterpillar

Dear Ann,
This is just one of several different color variations of the Whitelined Sphinx Caterpillar.  You may see other color variations here and here.

What's That Bug? does not endorse extermination

Subject:  Red Caterpillar
Geographic location of the bug:  Denver Colorado
Date: 09/17/2018
Time: 05:30 PM EDT
Your letter to the bugman:  Any idea what kind of bug this is? I’m 99% sure it is a caterpillar, but can’t find a similar one online. It is definitely a creature of some sort, it moved when I tried to pick it up.
How you want your letter signed:  Robin

Achemon Sphinx Caterpillar

Dear Robin,
This is a third instar Pandorus Sphinx Caterpillar, and here is a matching image from BugGuide.  According to Sphingidae of the Americas:  “L3: At this stage, the larvae look quite different. The long straight horn now curves and looks strikingly similar to a
Parthenocissus quinquefolia tendril. The larvae can be yellowish, green, brownish or reddish with 5 white eyespots around the spiracles on the sides of the larvae.”  Your individual has not yet shed its caudal horn.

Correction:  Achemon Sphinx Caterpillar
Thanks to a correction from frequent WTB? contributor Bostjan Dvorak, we acknowledge our initial mistake.

 

What's That Bug? does not endorse extermination

Subject:  Caterpillar
Geographic location of the bug:  Superior, Arizona
Date: 09/15/2018
Time: 07:31 PM EDT
Your letter to the bugman:  Seen crawling on a path in Boyce Thompson Arboretum
How you want your letter signed:  Lucy Lancaster

Whitelined Sphinx Caterpillar

Dear Lucy,
This is a Whitelined Sphinx Caterpillar, a species with several color morphs, including a dark variant we just posted.  Whitelined Sphinx Caterpillars are prove to periodical population explosions, especially in areas of the arid Southwest.

What's That Bug? does not endorse extermination

Subject:  Caterpillar
Geographic location of the bug:  Southeastern South Dakota
Date: 09/15/2018
Time: 09:34 AM EDT
Your letter to the bugman:  What kind of moth will this become?  Is the caterpillar dangerous to my flowers?
How you want your letter signed:  Susan

Whitelined Sphinx Caterpillar

Dear Susan,
This is a Whitelined Sphinx Caterpillar, and the adult Whitelined Sphinx is often confused for a hummingbird when it visits blossoms during the crepuscular time of day.  Most caterpillars feed on leaves and they do not do appreciable damage to plants unless they are quite numerous and the plant is already stressed due to other factors.

What's That Bug? does not endorse extermination