Subject: Giant blue spiked Caterpillar
Location: Central Portugal
July 9, 2017 4:59 am
I found this big guy in front of my house,
The Caterpillar is about 10cm long, and has tiny hairs on top of blue bumps that are on his green/brown body.
I found him on a hot day at the beginning of summer, it were about 38°C outside, so I carefully took him to a shadow and took these pictures.
I live in central Portugal.
Signature: Karl

Prepupal Great Peacock Moth Caterpillar

Dear Karl,
Many caterpillars change color just before pupation, and this prepupal Great Peacock Moth,
Saturnia pyri, is no exception.  It began life as a green caterpillar and now that it is ready to spin a cocoon and pupate, it has changed to an orange color.  Here is an Alamy image that depicts a prepupal Great Peacock Moth caterpillar.  Alamy also has a nice image depicting the entire life cycle of the Great Peacock Moth.  The green coloration is depicted on UK Moths where it states:  “Europe’s largest moth, although not British, has been found on one occasion, in Hampshire in 1984. However, being such a spectacular species, it is a favourite amongst livestock breeders, and is unlikely to occur here in the wild.  Abroad, the distribution ranges from southern Europe through Africa and the Middle East.  The adults fly from April to June and are easily attracted to light.   The impressive caterpillars feed on the foliage of a range of foodplants, primarily fruit trees.”  Saturniidae of the Western Palaearctic has a nice comprehensive description of the Great Peacock Moth that includes this fascinating bit of information:  “Larger larvae are capable of ‘chirping’. These ‘chirps’ are broadband, with dominant peaks ranging between the sonic (3.7 kHz) and ultrasonic (55.1 kHz) and are generated by a rapid succession of mandibular ‘tooth strikes’. Chirp trains are induced by simulated predator attacks and precede or accompany the secretion of a defensive chemical from integumental bristles, supporting the hypothesis that these sounds function in acoustic aposematism. It has been proposed that these caterpillars generate multimodal warning signals (visual, chemical, and acoustic) to target the dominant sensory modalities of different predators, including birds, bats, and invertebrates (Bura, Fleming & Yack, 2009).”  Finally,  this Portuguese blog Natureza em Directo Borboletas has some nice images of the adult Great Peacock Moth.

Prepupal Great Peacock Moth Caterpillar

What's That Bug? does not endorse extermination

Subject: large black bug with yellow spike
Location: Swansea. MA 02777
July 8, 2017 3:47 pm
This guy turned up 3 days ago, didn’t see him yesterday as it rained. He has been in the position on the brick for a number of hours. He has changed direction and as it gets later is no longer noise down. The pictures with the blue background were from 3 days ago. The brick ones are today July 8, 2017 in Swansea, MA we have walked past him numerous times but he has not moved.
Signature: wendleskins

Female Broad-Necked Root Borer

Dear Wendleskins,
This is a female Broad-Necked Root Borer, and what appears to be a stinger is actually an ovipositor that she uses to lay eggs.

Subject: A nest of grasshoppers??
Location: Ontario Canada
July 8, 2017 10:30 am
We opened up our window on the second storey of our home and found this nest filled with these light green insect resembling a grasshopper. I didn’t think that they made nests so I’m not sure if my assumption is correct or how they would even get there. Any info would be really appreciated.
Signature: Thanks for any info.

Grass Carrying Wasp Nest

This is the nest of a Grass Carrying Wasp.  The female Grass Carrying Wasp constructs her nest and provisions it.  According to BugGuide:  “Larvae are fed Gryllidae (particularly tree crickets) or other Orthoptera.” 

What's That Bug? does not endorse extermination

Subject: beetle id
Location: Eldersburg, MD 21784
June 26, 2017 12:23 pm
Distinctive orange beetle(?) with diamond marking. Google brings up lots of orange beetles but not this one.
Signature: Mary

Mating Ironweed Curculios

Dear Mary,
These mating Weevils are Ironweed Curculios.  According to BugGuide:  “Breeds in Asteraceae such as cocklebur (
Xanthium), ironweed (Vernonia), joe-pye-weed (Eupatorium), ragweed (Ambrosia).”

Subject: Strange beach beetle
Location: Mccarthy Beach Northern Minnesota
June 21, 2017 1:05 pm
Hi! I was on the beach and looked down and this insect was struggling to get out of a hole. His underside was a metallic orange and I was wondering what it was. Thanks!
Signature: Hailee

Jewel Beetle

Dear Hailee,
We thought your Jewel Beetle was a Golden Buprestid, but that species if found west of the Rocky Mountains.  We found a relative on BugGuide,
Buprestis striata, that looks like a convincing match to your beetle.

Subject: What is this? Is it poisoness?
Location: Found it in Ohio
June 30, 2017 7:44 pm
Found this on a pillow next to my 2 year old son with something attached to it’s leg. Is this thing dangerous and what is it?
Signature: Alicia

Spined Oak Borer with Pseudoscorpion

Dear Alicia,
This is a Longicorn or Longhorned Borer Beetle in the family Cerambycidae, and members of this family are not poisonous.  The hitch-hiker is a Pseudoscorpion, and as a flightless creature, it is taking advantage of the flying beetle to move from location to location, an act known as phoresy.  We found an image of
Anelaphus pumilus on BugGuide  that is also transporting a Pseudoscorpion and we have an image in our archive of a Spined Oak Borer, Elaphidion mucronatum, with a Pseudoscorpion.  Your Longicorn appears to have spines on the tips of the wing covers and according to Eric Eaton, the Spined Oak Borer can be identified by a “pair of spines at the tip of each wing cover.”  We believe your Longicorn is a Spined Oak Borer.