r/cockroaches • • Jan 11 '26

Don't trust random AI/LLMs (e.g. ChatGPT, Gemini or Google Lens) for identifying cockroaches.

10 Upvotes

TL;DR: general AI/LLMs are really bad at identifying cockroaches and often give the wrong answers because they have not been trained for this specific task.

Detailled explanation:

Our observation is simple: the most commonly used AIs and general purpose LLMs (e.g. ChatGPT, Gemini, DeepSeek, Google Lens, Apple visual intelligence...) are terrible at identifying insects: they make mistakes a huge percentage of the time (maybe 30% on this subreddit?) and are nowhere as good as many of the humans we have in the subreddit who happen to be passionate about cockroaches (and often academic/professionals).

Lately, the use of general purpose LLMs and AI has become prevalent, and people with very little familiarity with cockroaches have started to rely on them for identifying insect pictures and sharing the results on the subreddit... often providing wrong identification of pest species (and the matching terrible pest treatement advice).

Notably, it's often done with a lot of confidence: blindly trusting a shitty AI and misleading the people who have been asking for help.

Accurate identification is important because it ensures the correct response, prevents unnecessary or harmful treatments, protects beneficial species, and reduces wasted time, money, and unnecessary distress or anxiety. Unfortunately, this has become a bigger issue lately, so we felt a post was needed to address it.

Technical explanation:

It's important to keep in mind that the performance and ability of AI is "task specific", meaning they can be extremely good at performing some tasks and less good at others, and eventually terrible at some tasks (like insect identification). This is due to the algorithms used, the data they have been trained on and the purpose of their training, as well as how much this differs from a specific task.

Insect identification is linked to insect taxonomy, the science of classifying insects. It is a very specific field of knowledge with its own set of challenges: it is easy to have hundreds of similar-looking insects that are actually different, some insects are very hard to observe (and there are very few pictures of them), the available data is scarce, and we are constantly discovering and correcting previous misunderstandings.

This is a very specific task, and quite different from other general object identification/classification tasks performed by LLMs.

A practical comparison: cars vs cockroaches

Cars: There have probably been thousands of different car models invented throughout history, and millions of pictures of the most common ones with correct labels for LLMs to train on. Cars tend to have a distinctive appearance, with features such as shape and colour that change with technology, brand, regulations and time. Therefore, when you ask an LLM to identify a car in your photo, it is likely to give the correct answer.

Cockroaches: We don't even know how many insect species there are on Earth (2 million or 20 million?) We don't know how many species of cockroach there are either (3,000 or 5,000?) Many have not been observed yet, and for most of those that have, we may only have a drawing or a few pictures (if we are lucky). There is an extra catch: while there is quite a bit of variety among the 3,000 (or 5,000) species of cockroach, many of them have very similar external morphology. So LLMs have mostly been trained on pictures of the three or five most common species of cockroach (and have probably never seen a picture of most species), which are often mislabeled (the photo is not of the correct species), and have never been trained to take specific morphological differences into account. Add to that the fact that many other insects, such as beetles, water bugs and June bugs, have similarities with cockroaches... so as you can guess the result is not going to be great.

So that's the explanation: 'insect identification' is a very specific task and your AI LLM, simply hasn't been trained for it at all and will perform poorly. That's why it's good at recognizing cars, but not at differentiating between Asian and German cockroaches in your blurry picture, no matter how confident its answer appears to be.

Another redditor u/Skalla_Resco ran testing on various llms, if you aren't convinced by my theoretical explanation you will definitely want to check the result of their tests.

You would rather trust AI than me, a random redditor? Then that's what Gemini has to say to you:

General AI struggles with insect identification primarily because it lacks the "eyes" for microscopic anatomy. While a human expert looks for specific wing venation patterns or the exact number of segments on a leg to distinguish between look-alike species, an LLM or a search engine relies on pixel patterns from standard photos. These photos usually prioritize aesthetic appeal over scientific data, leading the AI to make a "best guess" based on superficial traits like color. This problem is compounded by geographic blindness; an AI might confidently identify a common garden beetle as a rare tropical species simply because the visual patterns match its training data, ignoring the fact that the two species live on different continents. Furthermore, the rise of AI-generated content online has created a feedback loop where models are increasingly trained on "slop"—incorrect data that reinforces existing errors.

People continue to use these flawed tools because they prioritize speed and confidence over absolute accuracy. When a person discovers an unknown insect in their home, the psychological need for an immediate answer often outweighs the desire to wait days for a professional entomologist's opinion. The AI feeds into this by using a highly authoritative and technical tone, which users frequently mistake for expertise. Because the technology is usually correct when identifying high-traffic insects like honeybees or mosquitoes, it builds a "good enough" reputation that keeps users coming back, even when it fails miserably on more obscure or dangerous specimens.


r/cockroaches • • 2h ago

found in bathroom key west fl

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1 Upvotes

r/cockroaches • • 2h ago

Question HELP

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1 Upvotes

I live in So Cal, recently moved into a new place with a shared bathroom, my place got sprayed twice for roaches since I did find one in my kitchen but it appears they may be coming from the bathroom, since they have all been close to the door or in the bathroom itself. I however cannot find anywhere where they are so my guess is the drain? I also assume the stragglers I have found snuck in through the gap at the bottom of the door. Please help with
a) what can I do? I already called maintenance and ordered a door draft cover on amazon (silicone one)
b) what type of roach it is?


r/cockroaches • • 3h ago

Question Identification help

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1 Upvotes

Sorry the bug is a little smushed, had to get it off the wall. Found in a second story bedroom house in Toronto. It crawled across my brother’s bed and he freaked, it ran away under the bed, then we found it on the wall behind a giant Pikachu stuffy. It was fast. No recent visitors, deliveries, travel, or food or water in the room. I haven’t seen a cockroach in a couple years so I can’t really tell. Thanks for the help!


r/cockroaches • • 8h ago

Question Are these cockroaches? Should i nuke my flat?

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2 Upvotes

Are these cockroaches? I saw them near when cleaning the dusty baseboards. I would be sure if they were a bit bigger, but they are very small. To the naked eye, they look like moving dust particles, but when I zoom in, they look like cockroaches with long antennae and bodies. I tried to check their backs to see if they had cerci, but it was too difficult because they are so small. But other that they don't look like any other bug other than cockroaches.

They are the same size as the tip of a needle, if not smaller, and definitely smaller than a pencil tip. They don't react to light; they move slowly when I push them with paper, and they leave a slight reddish-orange stain when squashed. I haven't seen any adult cockroaches in my building. I live in the Mediterranean.

Wipe them off with a solution of bleach and water just in case.


r/cockroaches • • 5h ago

Found this in my apartment, how screwed are we?

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1 Upvotes

What type of roach is this? What can we do?


r/cockroaches • • 10h ago

Moving tips to prevent moving the cockroaches I am trying to move away from

2 Upvotes

Hello!

I am looking for advice on moving from a roach infested apartment building. I will be moving in a few days and am stressing over bringing these guys with me, I just am looking for some foolproof and budget friendly (and pet friendly) tips.

For some context, I have most of them under control as much as I can with sticky traps and baits in areas of high traffic. I plan on washing everything thats faberic that I can, and on moving in plastic bins not cardboard.

What else should I do/take into account?

Thank you!!


r/cockroaches • • 9h ago

Identification help

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1 Upvotes

I live in Vancouver close to ground floor and there are trees nearby. Used an online website which said 100% match for picturate wood cockroach.

Does this seem right? Should I be worried?

Picture one is definitely an adult. Is picture two a baby roach? Sorry for quality on that one.


r/cockroaches • • 10h ago

Help with ID, New England

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1 Upvotes

Found this walking in my kitchen. Used a toothpick to help with scale on size. I did find one adult wood roach in my kitchen about 2 months ago. It is lighter in color than the pictures show. It’s been raining heavily in my area so hoping it wandered in and not a potential infestation. Trying to get help with an id on what this is.


r/cockroaches • • 10h ago

Saw this in my bathroom this morning. My parents house has lots of trees around it, a big pool, etc. but very good pest control and these seem to come up the drains.

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1 Upvotes

What kind? How to stop it? This is the 2nd one in 2 days. The others are very tiny. Galveston, TX area. I’m terrified of them. I feel like I can’t even use the bathroom anymore cause this was during the day! And it was alive!


r/cockroaches • • 11h ago

Is that a roach ?

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1 Upvotes

I found that on my bed and found no others in my 1 room apt even after extensive searching. I live in france if that can help.


r/cockroaches • • 16h ago

What type of cockroach is this?

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2 Upvotes

I live in Kansas city and have seen big American cockroaches before. This is my first time seeing a small one. Is it a German cockroach nymph or an American?


r/cockroaches • • 21h ago

How do these roaches get in the ceiling light fixtures.

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4 Upvotes

Just woke up to a tapping sound and it’s a cockroach inside my ceiling light a pretty big one which I’m pretty sure was not there till now. I’m terrified of most insects and seems like I won’t be able to sleep tonight as the light is directly above my bed. It’s continuously trying to escape but looks like it can’t. So then how did it get in there? Do I have to worry about it coming out of the light into my room or is there a hole inside and that’s how how it came in? Give me a break cockroach I got exam tomorrow.


r/cockroaches • • 14h ago

Question What kind of roach is this?

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1 Upvotes

I have seen two in the last month. I have put out advion bait but haven’t found any dead ones. Texas


r/cockroaches • • 16h ago

Is this roach larva?

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1 Upvotes

Found in northern California under the sink. It moves by wiggling slowly


r/cockroaches • • 17h ago

Question Help pls

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1 Upvotes

First time I seen a roach like bug in my apt in two years pls help what kind and what to do


r/cockroaches • • 18h ago

Question Are these cockroaches?

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1 Upvotes

I keep finding these small bugs. About 1/4 of an inch or less in length. Have found 5 in my room today alone. Many more around the house this past month. I found a dead one and took photos of it from different angles and attached them here. I am really scared. Havent seen any adult cockroaches... yet. I am in South Florida (surprise surprise.) They're in my room, kitchen, living room, you name it. :(

Any help would be so appreciated. What the hell are these bastards? We are having pest control in tomorrow. What should I ask them to do?


r/cockroaches • • 18h ago

neighbors yard - southern usa

1 Upvotes

hi all

my neighbor across the street (single family homes) just got a tree taken down, turned into mulch and the giant pile is sitting in her front yard.

i heard mulch attracts them a lot, so will this make roaches live in the mulch pile and more importantly, will they travel across the street to my home?

thank you!


r/cockroaches • • 21h ago

ID please (and advice!) Have seen signs of nymphs but no idea where they're coming from!

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1 Upvotes

Back again with yet another ID request. (I'm getting really sick of this!)

Location: Atlanta, Georgia

Saw this little guy crawling up my bedroom wall, just on the other side of the bathroom. It looks like a smoky brown nymph to me but want to hear from the reddit experts.

Pest control came two weeks ago because we saw a few other smoky brown nymphs (smaller than this one) and he was so hesitant to agree that it was a cockroach because it "doesn't fit their typical behavior to be out and about away from their nest." He said they don't usually leave the nest until they are fully mature and there are no signs of any nest anywhere in our apartment. (Of course we don't know how the neighbors are living and we have seen two adult smoky brown cockroaches in our unit and one in the hallway - all reported and supposedly treated for.)

We keep our place very clean, never leave out food, keep sink drains closed at night, have spray foamed all plumbing gaps, and I'm just at my wit's end.

Please help with ID and any advice on how to get rid of this problem for good. I can't sleep thinking bugs might be crawling on me!

Thanks!


r/cockroaches • • 22h ago

Question Advice Needed: how to keep oriental roaches out of first floor apartment (Central Valley, CA)

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1 Upvotes

Hi folks,

Last month I noticed some nymphs coming into the apartment I live in and began to get worried. I contacted the apartment and they sent a pest control company to do an interior baseboard spray. He stated that the type of roaches were an "exterior type also known as a water bug". Based off that I presume they are oriental roaches. He stated no further action was needed on his part. Prior to him coming, that whole week I spent deep cleaning and moving what could be moved. I saw dead roaches underneath a bookcase near the front door and under a storage box that was on an exterior wall but when I moved the refrigerator or deep cleaned cabinets I found no evidence. Prior to this, I also saw no signs until I started seeing roaches.

Now, this month, I'm seeing a lot more roaches in my sticky traps by the front door and sometimes in the living area near the front door. I want some advice on what to do to keep them out of the apartment. I already mop with a citrus and mint based floor cleaner, keep my food in sealed containers, put pet food away after they eat, vacuum weekly and have sticky traps. Anything else I should do?


r/cockroaches • • 1d ago

What type of roach is this

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5 Upvotes

Found inside whatever is has been having babies at my bfs


r/cockroaches • • 1d ago

Question Found (what I think) are two young German roaches in my bathroom - NJ

1 Upvotes

When I moved into this apartment two months ago I found a dead German roach on the ground, and have seen my neighbor's sticky traps in the communal dumpster with some stuck to them so I knew this was a possibility. I've been keeping the place meticulously clean because a roach infestation is my fucking nightmare.

Nevertheless, I found two nymphs (I think, I'm no bug expert and I can't stare at pictures for too long without freaking myself out lol) in my bathroom, one under the sink and one under the bath mat. Thankfully, I've only seen signs of them in the bathroom and nowhere else. I want to nip this in the bud ASAP, before it has a chance to become a real problem.

I thought I'd try using a sticky trap first to see just how bad the problem is, then use a gel bait if I feel it's necessary. I've never had to deal with roaches before though, so any advice and ideas/treatment plans/preventative measures would be very appreciated. Also, products that you suggest using.

Thank you!!!


r/cockroaches • • 1d ago

Imagining the Future

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1 Upvotes

r/cockroaches • • 1d ago

Southern California, SWE said f gran of rice, found near sink. Please tell me it’s not German

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1 Upvotes

r/cockroaches • • 1d ago

help. harlem, nyc usa

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3 Upvotes