When you see a dark, quick moving insect in your house you can quickly wonder if you have a problem with cockroaches. But there are many creatures that look like cockroaches and are often mistaken for them, such as beetles, water bugs, crickets and other insects.
If you see a bug that looks like a cockroach, you can tell what it is by looking at its body form, antennae, wings, size and behaviour. Knowing the difference between cockroaches and bugs that look like cockroaches is crucial since the right pest-control strategy depends on the insect involved. We’ll go over common cockroach lookalikes, how to tell them apart, and what features typically identify an actual cockroach below.
What Does a Cockroach Look Like?
It is useful to know the basic features of a roach before learning about creatures that look like cockroaches.
Most cockroaches have
- An oval flat body
- 6 legs
- Extremely long antennas.
- A brown, reddish brown, tan or near black look
- The pronotum, a shield-like part behind the head
- Fast-running behaviour
- Wings in numerous adults
Their size varies greatly depending on the species. German cockroaches are very small, while American cockroaches can grow to almost an inch in length.
1. Ground Beetles
Some of the most frequent bugs that are mistaken for roaches are ground beetles. Many are dark brown or black, running fast if startled. For that reason, a person observing one scurrying across a floor would mistake it for a roach-looking insect. The simplest distinction is physical shape . Cockroaches are generally flatter; ground beetles are tougher and more rounded or elongated. Also, beetles have stiff front wings called elytra that typically form a visible line down the middle of the back. If you want a beetle that looks like a roach, ground beetles are generally the reason.
2. June Bugs
Another example of roaches that seem like beetles at first glance — or beetles that may be mistaken for roaches, more properly — are June bugs. These bugs are usually brown and rather big. June bugs are not cockroaches, with their spherical bodies and short antennae. Outdoor lights also attract them, and they are regularly seen flying over windows and porches during the warmer months. So that big cockroach-looking bug fluttering around a porchlight might be a beetle, not a roach.
3. Water Bugs
The name “water bug” is rather misleading. Sometimes the word “water bug” is a term for huge roaches, especially American or Oriental roaches. But the real water bugs of the aquatic kind are from totally different insect groups.
True house water bugs, which resemble cockroaches, may have a wide, dark body, but aquatic bugs typically have physical adaptations for swimming and reside near ponds, streams or other moist areas. Proper identification is very important before believing it is a true water bug when a large dark insect is seen over and over in kitchens, basements, drains or bathrooms.
4. Crickets
Crickets often make this list of insects that resemble cockroaches, especially if you witness them darting around a dark room. Both insects can have lengthy antennae and dark brown bodies. But crickets have notably bigger back legs made for jumping. Cockroaches are runners, not jumpers. If you notice a long slender cockroach appearing bug with powerful rear legs, you may actually be dealing with a cricket.
5. Longhorn Beetles
A longhorn beetle may be a cockroach-like bug with long antennae. Longhorn beetles are well renowned for their antennae, which may be as long as or longer than their bodies. Some species are brown or black and look like cockroaches from a distance. Check out the physique shape. Longhorn beetles tend to be more cylindrical and stiff looking, whereas roaches are more broad and flat. The hard wing covers of the beetle also aid to distinguish it from a cockroach.
6. Click Beetles
If someone asks ” What other bugs look like roaches ? ” another viable answer is click beetles . Their bodies are frequently long and slender, and brown or black. Depending on the species some can grow into large roach-like bugs. But click beetles are frequently much longer than cockroaches. Many species can snap their bodies when laid on their backs and propel themselves into the air . This is the clicking behaviour that gets them their name .
What Looks Like a Cockroach but Flies?
What looks like a cockroach and flies is a typical question. Unfortunately, sometimes the answer is a real cockroach. Some cockroach species have functioning wings. June beetles, longhorn beetles and other brown beetles can also be mistaken for cockroaches among flying insects. If you spot a roach-like bug with wings, check at how the wings rest on the body. Beetles usually have rigid wing covers, cockroach wings tend to lie flatter on the back.
Little Bugs That Look Like Roaches
Not all bugs that look like cockroaches are big. Some small bugs such as roaches may be miniature beetles or nymphs, the young roaches. Cockroach nymphs can be hard to recognise since they do not necessarily look like adult cockroaches. They are smaller generally and they have not got fully grown wings yet. If you notice plenty of little brown bugs coming and going around your food, cupboards, appliances or plumbing, you might want to get the bug diagnosed by a specialist.
Cockroach Without Antenna: Is It Still a Roach?
If you notice anything that looks like a cockroach, but is missing the antenna structures, usually cockroaches have 2 long antennae (feelers), therefore, however, antennae can break or get damaged. So just because a bug is lacking its antennae doesn’t mean it’s not a cockroach. But if the bug looks like it has very small antennae from the start, it may be a beetle or other cockroach imitation.
Bugs That Look Like Cockroaches in Illinois
If you live in Illinois and you are looking for bugs that look like cockroaches, you could find a few varieties of beetles, crickets and real cockroach species. Sometimes seasonal outside insects mistakenly infiltrate homes through windows, doors, gaps or around exterior lighting. So a single beetle inside doesn’t necessarily mean an infestation. Repeated sightings of cockroaches, especially smaller roaches, in kitchens and bathrooms are more worrisome and may call for pest-control measures.
Cockroach or Something Else? Quick Identification Tips
Not sure if you are looking at a cockroach or something else? Begin with these traits.
Body: Usually cockroaches are flat and round. Beetles are usually tougher, thicker and rounder.
Antennae: Cockroaches usually have quite long antennae.
Movement: Usually, when roaches are exposed to light, they run incredibly fast.
Wings: Hard beetle wings, flat thin cockroach wings against the body.
Back legs: Large leaping legs usually indicate a cricket rather than a cockroach.
Final Thoughts
A lot of bugs seem like a roach but aren’t therefore you can’t just assume your house has a cockroach infestation just because you see one brown bug. June bugs, click beetles, longhorn beetles, crickets and other insects can all seem like cockroaches under the correct circumstances. So can ground beetles. When identifying which bug resembles a cockroach consider body shape, antennae, wings, legs, movement and where the insect was found. A real cockroach typically has a flattened body, long antennae, fast-running behaviour, and classic roach-like dimensions.
If you are seeing bugs like cockroaches inside or you are unsure whether an insect is a cockroach species or a harmless beetle, professional identification can help you decide on the proper next step without treating your home for the wrong pest.
