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What's That Bug? does not endorse extermination

Subject: Caterpillar?
Location: Buffalo, NY
August 20, 2017 10:47 am
Can you tell me what this is and is it harmful?
Thank you
Signature: Sue

Cecropia Moth Caterpillar

Dear Sue,
This impressive caterpillar is a Cecropia Moth Caterpillar.  It is perfectly harmless unless a morbid and irrational fear of the unknown causes a person who encounters one to flee, and run in front of a car.  Even the most benign creatures can be a contributing factor in the harming of a human being.   The caterpillar will eventually metamorphose into a gorgeous, and very large Cecropia Moth.

What's That Bug? does not endorse extermination

Subject: What’s this caterpillar?
Location: Melrose Florida
August 19, 2017 10:10 am
Hello, I’m in Melrose Florida in a wooded area and came upon this guy on the trail. I’m curious what he is and since I can’t find a photo like him in my online searches thought you might appreciate this one. He’s about 4 inches long and 3/4 inch diameter. Beautiful creature and intimidating with all those spikes on his head.
Signature: Kimberly

Hickory Horned Devil

Dear Kimberly,
The Hickory Horned Devil is one of the largest and most impressive caterpillars in North America.  Though frightening looking, it is perfectly harmless, and those spikes are not capable of stinging.  This is our first Hickory Horned Devil sighting of the season.

Very cool! Thanks for the response. He was very beautiful!

What's That Bug? does not endorse extermination

Subject: Large caterpillar
Location: Southern AZ
August 19, 2017 10:04 am
We live in southern AZ had have these giant greenish gray (photo attachment) and tan version of this attached caterpillar on our AZ cotton. Are they the Horned devil caterpillar?
Signature: Len Nowak

Citheronia splendens sinaloensis Caterpillar

Dear Len,
You are quite observant to notice the similarities between your caterpillar and the Hickory Horned Devil, but that species is found only as far west as Texas according to BugGuide information.  Your individual looks so similar because it is a close relative in the same genus
Citheronia splendens sinaloensis, a moth with no common name.  The adult moth, which is pictured on BugGuide, is a darker, duller variation on the adult Royal Walnut Moth, the adult Hickory Horned Devil.

Citheronia splendens sinaloensis Caterpillar

Thanks Daniel
Besides the AZ horned devil….
We have amazing critters here at 4200′ in southern AZ.
A small sampling…
Signature:  Len Nowak

“Arizona Devil”

Thanks for the additional images Len.  The new “Arizona Devil” image is a wonderful addition to your previous posting.

What's That Bug? does not endorse extermination

Subject: What is it?
Location: Thunder Bay Ontario Canada
August 9, 2017 6:28 pm
Hi just curious on these 2 types of caterpillars found
Signature: Colin Burridge

Columbia Silkmoth Caterpillar

Dear Colin,
Our research on BugGuide indicates this is a Columbia Silkmoth Caterpillar,
Hyalophora columbia columbia, which is the north eastern subspecies.  According to BugGuide:  “In eastern North America [ssp. columbia], the preferred food of larvae is Tamarack (American Larch – Larix laricina).”

What's That Bug? does not endorse extermination

Subject: Big bug
Location: Bowling green, Ohii
August 7, 2017 2:33 pm
Hi,
I have seen these creaturs before but rarely. My friend just sent me your site. This one was almost 2 inches long.
Thanks in advance for your ID help!
Signature: Lynn

Polyphemus Moth Caterpillar

Dear Lynn,
This is the caterpillar of a Polyphemus Moth.  Despite having two prominent eyespots, the Polyphemus Moth was named after the one-eyed Cyclops of Odyssey fame.  Polyphemus Moths are found in all 48 of the continental United States.  Featured Creatures has an excellent posting on the Polyphemus Moth which includes this information:  “Caterpillars are solitary and develop through five instars. Immediately after hatching, caterpillars eat their egg shells (Opler et al. 2012 ). Older instars eat whole leaves and then sever the petioles to drop them to the ground (Tuskes et al. 1996) – possibly to obscure their presence from predators The presence of large larvae on branches overhead may often be detected by the presence of frass (caterpillar droppings) on pavement of driveways or parking lots.”

What's That Bug? does not endorse extermination

Subject: Large Green Caterpiller
Location: Newburg, PA
August 5, 2017 3:16 pm
We discovered this caterpillar eating the leave of our tulip poplar tree. We don’t want them to destroy the tree as it’s a young tree we transplanted this spring. Can you identify them and is it safe to relocate them? I haven’t been able to find anything that looks similar. We are in south central PA and found these on August 5th.
Signature: Scott Lehman

Promethea Moth Caterpillars

Dear Scott,
Based on this BugGuide image, we believe your caterpillars are Promethea Moth Caterpillars,
Callosamia promethea, or possibly a related species in the same genus.  According to BugGuide:  “larvae feed on leaves of apple, ash, basswood, birch, cherry, lilac, maple, sassafras, sipcebush, sweetgum, tulip-tree ; also recorded on buttonbush, magnolia, and other trees.  adults do not feed.”  There is no need to relocate them as they will not appreciably damage your tulip tree.  These individuals are nearly fully grown and they will soon stop eating and pupate.

What's That Bug? does not endorse extermination