Beetles and cockroaches may appear similar at first glance, causing confusion for many homeowners.
While both insects are common household pests, there are distinct differences in their appearance, behavior, and the strategies used to manage them.
In this article, we will discuss some beetle species that resemble cockroaches and how to tell them apart.
Beetles That Look Like Roaches
One beetle commonly mistaken for a cockroach is the ground beetle.
These insects are often found outdoors under stones, logs, and other hiding places.
Some ground beetles are attracted to indoor lights, potentially leading homeowners to believe that they have a cockroach infestation.
Another beetle species often confused with cockroaches is the larder beetle.
Adult larder beetles are dark brown, oval-shaped, and have a cream to yellow-colored band across their wing covers.
While not as common indoors as cockroaches, larder beetles can still become a nuisance in homes if not properly identified and managed.
Distinguishing Features of Beetles and Roaches
Beetles and roaches have different body shapes. Beetles generally have a more rounded and oval-shaped body, like the Cigarette and Drugstore Beetle, while cockroaches exhibit a flatter and more elongated shape.
- Beetles: Usually have clubbed or sometimes thread-like antennae
- Cockroaches: Possess long and thin, often filamentous antennae
In terms of wings:
- Beetles: Hard, protective front wings called elytra, covering their back wings
- Cockroaches: Two sets of wings with leathery front wings called tegmina
- Beetles typically move slower due to their sturdy, armored body
- Cockroaches are known for their swift and agile movement
Here’s a summary of the physical differences:
|Long and thin
|Swift and agile
Common Beetle Species That Resemble Cockroaches
Ground beetles are one of the most common beetle species found in North America. They are:
- Often mistaken for roaches
Some ground beetle species have metallic sheen.
Palo Verde Beetles
Native to the southwestern United States, the Palo Verde Beetle is large and often mistaken for a roach. They have:
- Dark-brown or black exoskeletons
- Grow up to 3.5 inches in length
- Large jaws, used for digging
Click beetles are named for the clicking sound they make when they flip themselves upright. They are:
- Long and narrow
- Tapered at both ends
- Click sound is mistaken for a roach
Long-horned beetles are characterized by their lengthy antennae. They are:
- Usually elongated
- Medium to large in size
- Attracted to lights at night
Long-horned beetles can be mistaken for roaches due to their size and nocturnal behavior.
Carpet beetles are small, oval-shaped insects that can be mistaken for small cockroach nymphs. They have:
- Varied patterns and colors
- Feed on natural fibers
- Invade homes and damage textiles
Here’s a summary of beetle species that appear as roaches
|Palo Verde Beetles
Roach Lookalike Insects and Bugs
June bugs, also known as May beetles, are commonly mistaken for roaches due to their brown color and oval shape. However, they are smaller in size and have distinguishable wings.
- Size: 0.5-1 inch
- Color: Brown
- Wings: Present
Crickets resemble roaches with their flat, elongated bodies and long antennae. They differ in their size, color, and the presence of hind legs.
- Size: 0.5-1 inch
- Color: Brown or black
- Legs: Strong hind legs for jumping
Water bugs, also called giant water bugs, are often mistaken for roaches due to their similar size and flat, oval-shaped bodies.
These aquatic insects can grow larger than common roaches and have front legs adapted for capturing prey.
- Size: 0.75-4 inches
- Color: Brown or black
- Legs: Front legs for catching prey
Earwigs might be mistaken for roaches because of their similar body shape and color. Nonetheless, they are easily distinguishable by the pincer-like cerci at their abdomen’s end.
- Size: 0.5-1 inch
- Color: Brown or black
- Cerci: Pincer-like appendages
Termites might be confused with roaches due to their general body shape. However, they have a straight waist and straight antennae, unlike the common roach.
- Size: 0.25-0.5 inch
- Color: Creamy white to dark brown
- Antennae: Straight
|Brown or black
|Brown or black
|Brown or black
|Creamy white to dark brown
By being aware of these differences, you can identify and address any insects that look like roaches but are actually beetles or other bugs.
Pest Control and Prevention
To identify beetle infestations, look for signs such as:
- Small, brown, or black insects resembling roaches
- Damaged materials like carpets, wood, or food items
- Larvae or shed skin around the infested area
Professional Pest Control Options
Hiring pest control professionals offers benefits, such as:
- Expertise in identifying pests
- Access to advanced treatment techniques
- Follow-up visits to ensure success
However, there might be drawbacks:
- Costly services
- Possible disruption of home routine
DIY Pest Control Measures
Effective DIY pest control measures include:
- Cleaning and decluttering: Remove potential food sources and breeding sites, eliminate clutter, and vacuum regularly.
- Sealing entry points: Caulk cracks and crevices to prevent pests from entering.
- Traps: Deploy sticky traps to catch small numbers of beetles.
- Insecticides: Spray targeted insecticides on infested areas. Follow label instructions carefully.
Comparison of Pest Control Options
|Expertise, advanced techniques, follow-up visits
|Cost, possible home disruption
|Cost-effective, control over methods used
|Limited expertise, time-consuming
Remember, early identification and the right pest control methods are key in preventing beetle and roach infestations.
Health Risks and Other Concerns
Despite their visual resemblance, beetles and roaches are different in terms of health risks.
While roaches are well-known for carrying diseases such as salmonella, diarrhea, dysentery, and cholera, beetles typically do not transmit these diseases.
However, they may still cause concerns due to their contamination of food products or the potential for allergic reactions.
Impact on Crops
Beetles and roaches also differ in their impact on crops:
|Can harm various crops, especially when they occur in high numbers
|Primarily a household pest, not usually a concern for crops
|Blister beetles found in hay can be dangerous for livestock in large amounts1
|Concentrate on residential areas, often in urban settings2
Beetles can have a significant impact on agriculture, such as the bark beetle, which has ravaged tens of thousands of square miles of woodlands3.
Roaches, on the other hand, focus on human dwellings, and are less of a concern to the farming industry.
- Beetles can damage crops and cause potential health concerns by contaminating food products.
- Roaches are known to carry diseases and are more likely to be found indoors.
- The impact of beetles on agriculture can include harming crops and causing issues for livestock.
Habitats and Diets
Natural Habitats of Beetles and Roaches
Roaches, on the other hand, are insects preferring warmer and moist environments, often inhabiting:
- Upholstered furniture
- Kitchen appliances
- Wall voids
|Ponds, lakes, and rivers
Beetles exhibit a range of diets, including:
For example, some beetles like ladybugs are predators that feed on aphids, whereas others like dung beetles consume animal feces.
The larder beetles feed on stored food products, which could lead to an infestation if not controlled.
Roaches are known to be scavengers with a diverse diet, often consuming:
- Human food
- Dead insects
In summary, beetles have a wide range of habitats and diets, whereas roaches prefer warm, moist environments and have a more diverse and opportunistic feeding habit.
Beetles and cockroaches, while often mistaken for one another, exhibit distinct differences in appearance and behavior.
Several beetle species, such as ground beetles, larder beetles, bess beetles and Palo Verde beetles, can be confused with roaches due to their similar appearance.
Key distinguishing features include body shape, antennae structure, and wing characteristics.
Beetles typically inhabit diverse environments, from forests to aquatic areas, and have varied diets. In contrast, roaches prefer warm, moist environments and have a broader diet.
Recognizing these differences is essential for accurate identification and appropriate pest management.
Over the years, our website, whatsthatbug.com has received hundreds of letters and some interesting images asking us about beetles that look like cockroaches. Scroll down to have a look at some of them.
Letter 1 – Beetle Pupae, but which Beetle???
Subject: Weeping Willow Bug?
Location: North Carolina
October 14, 2012 11:27 am
Found this cocoon like bug on my weeping willow…what is it?
Signature: Does not matter
Dear Does not matter,
These are Beetle Pupae, and our first thought is that they are most likely some species of Leaf Beetle in the family Chrysomelidae.
We are entertaining the possibility that they might be Imported Willow Leaf Beetle pupae, Plagiodera versicolora, which we learned about on BugGuide.
Alas, BugGuide doesn’t have many pupae photos and those seem to be from the wrong angle to be certain. They could also possibly be Lady Beetle pupae like the V-Marked Lady Beetle pupae pictured on MoBugs.
Letter 2 – Beetles
I have photos if necessary. It’s not an earwig, but approximately that size. This bug is solid black, no wings, doesn’t reduce size really at the abdomen and what not. Small legs, nothing like a cricket.
Not like a beetle, nothing like a cockroach. We’ve found a few of these crawling across the floors lately, and it freaks out my wife hehe. Any ideas? Would the photos help?
Photos always help. Might be a rove beetle. There is a species known as the Devil’s Coach Horse, Staphylinus olens, that is solid black. It is a true beetle, though is rather atypical appearing.
They are European imports, and eat snails and slugs, hence are advantageous to the gardener. Both adults and grubs are adept hunters.
Letter 3 – Beetles
Amazing. I have searched the web for a few days, identify a bug sites, all kinds of crazy stuff. Nothing. No where. I email you and you instantly know what it is. I attached the pictures of the one specimin I photographed closely.
I googled up a bunch of photos. But the photos I have seen of live ones and what not, if there are no very close relatives, that is it.
You said they are European imports. So they are already across the United States? They are in Salt Lake City anyway. A little more reading on them, they say they raise up like a scorpion when scared, release a stinky smell from their abdomen (true) does not sting but can give a painful bite.
We are not gardeners, we live in brand new apartments, and we are finding them in our house. Should something be done? Or should we just scoop them up and let them outside? Thanks again on identifying it, with such a vague description really. Best site 🙂
google.com search identify a font.
The site, identifies fonts, asks one question at a time, and identifies the font, to 2 or three fonts out of like 10,000 fonts. A bug site like that, would be amazing. I’m not much of a bug expert, but if you wanted any design help for such a site, let me know.
Letter 4 – Beetles
Re: Yellow and Black
Hi….I have for years seen a very strange looking large bug in my yard in California but have not seen it anywhere else in the US. I
t is roughly 1.5-22 long, yellow with black stripes, super shiny, 3 segments, and the tentacles or arms look so fat it almost looks like it has baby arms.
It is by far the most disgusting bug I1ve ever seen.
What is it?
If you hadn’t said you lived in California, I would have immediately thought of the Locust Borer, a large beetle that fits your description.
I did a web search, and have noticed that the range is expanding. Here in Los Angeles, we do have Black Locust Trees, so it is conceivable that the range of the Locust Borer now includes California.
Here is additional information as well as a photo. Please let us know if the range of the Locust Borer now includes California. The locust borer, Megacyllene robiniae (Forst.), is a native insect.
Its original range probably coincided with that of its host tree, the black locust, which once grew only along the Allegheny Mountains from Pennsylvania to Georgia and in the Ozark Mountain region.
Black locust grows readily on poor sites and is used extensively in land-reclamation plantings. Its widespread use to reclaim land damaged by farming and strip mining, its use as a shade tree, and its use in reforestation have dispersed the borer with its host tree over most of the United States.
The borer is now found from eastern Canada south to the Gulf States and west to Washington, Colorado, and Arizona.
The borer attacks only black locust (Robinia pseudoacacia L.) and its cultivars (horticulturally derived varieties in the genus Robinia); the honey locust (Gleditsia triacanthos L.) is not affected.
Letter 5 – Beetles
I need help…. Bad. I just had both of my hips replaced the last one in Feb. I was out walking in my yard, I live out in the Country in Missouri, near Kansas City. I was swarmed by what I thought at the time was Bees, flying around me.
I did my best to try and run, but not good at that as of yet.I just knew I was doomed… Ok, I didn’t get stung. A guy was at my home to work on something and I asked him to go out and see what there were,….BEETLES…. LOTS of Beetles.
Close in size to June bugs, not as tall or thick, but length wise close. When flying, I thought they looked like bees, yellow jackets or something. Because they have yellow showing when in flight.
When captured…They are a Green Metallic,all across the back,but tipped in yellow, and at the point if you can call it that, of the bottom, they are yellow too. Alsothe under side is yellow around the base of the legs, than metallic green down the leg. (I hate Bugs)Really bad….
Now I have thousands of these beetles, Someone said Japanese Beetles, but in photos,they are shaped somewhat different and are a brownish on the back, these have no red, or brown… Please Help me…. Susan N. Photography Liberty, Missouri
I think you have been terrorized by GREEN JUNE BEETLES, Cotinus nitida. Here is some information as well as a drawing I discovered on two websites:
Adult — The beetle is 15 to 22 mm long with dull, velvety green wings. Its head, legs, and underside are shiny green, and its sides are brownish-yellow.
Joe Boggs reported that GREEN JUNE BEETLES, Cotinus nitida, are terrorizing backyard gardeners, sunbathers, small pets, etc., as they buzz lawns in southern Ohio. These big, metallic green beetles tend to emerge en masse.
Their large size, coupled with an audible “buzzing” sound and low level flight plan (cruising at about 2 to 3 feet) may induce mild panic in those individuals unfamiliar with this insect. Adults feed on tree leaves as a skeletonizer.
Fortunately, they rarely cause significant plant injury. Their primary goal is to locate turf with high levels of organic matter (e.g. thatch) in which to lay eggs. Lawns covered with partially composted manures have also been found to be highly attractive to the adults and they may burrow into cool compost piles, under decomposing manure and into decayed mulch.
It has been speculated that this attraction to decomposing organic matter explains why adults tend to show-up in large numbers on certain lawns while ignoring surrounding turf. Unlike other Scarab beetle larvae such as Japanese beetle grubs, green June beetle grubs burrow 10 to 12 inches into the soil and they remain closely associated with these burrows.
The grubs do venture out at night, especially after heavy rains, to feed on thatch and other organic matter and they occasionally find their way onto driveways, sidewalks and into swimming pools. Despite their large size, green June beetle larvae seldom cause injury to turf equal to that caused by Japanese beetles or masked chafers.
Letter 6 – Beetles
I live in a small town in Norfolk in the UK. I wonder if you would be able to give me any information on a bug that we only seem to get in our area. We believe the bug is called either a July Bug or a Billy Witch.
It’s a beetle of about an inch in length with a hard outer shell but the also fly and try to get tangled in anything they can. Is there anything else you could tell me about this bug so I can prove
to my neighbour they exist.
I’m guessing that our May Beetles, also called June Bugs, are what you are calling a July Bug, since it fits your description.
It is a type of scarab beetle that is attracted to lights at night. I have never heard the name Billy Witch before, but it is a good one.
Letter 7 – Beetles
Last summer bore beetles wiped out half the pines in my yard. (1 acre.).Since the Florida drought is over and steady rains are back, and the pines are not as stressed as last year, will my remaining loblolly pines fight off the bore beetles naturally or do I have to spray with something.
And if I spray is it true the beetles are only on the trunk of the tree. Last but not least, what do I spray with? Thanks from Central Florida, Roger
Like many living forms, insects reach a peak population, do major damage, and then suddenly die back to a small population which takes seasons to grow large again.
The stress on the trees due to the drought combined with the population explosion of the beetles contributed to the tree loss. That population was increasing, doing hidden damage for years.
The best control is to rid the area of tainted wood from the dead trees which is harboring the pest. Check with local exterminators regarding a pesticide control.