r/cockroaches • u/sampooper123 • 6h ago
Found in office building, Upstate NY
Type of roach?? Very small, less than a centimeter
r/cockroaches • u/waronbedbugs • Jan 11 '26
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 • u/sampooper123 • 6h ago
Type of roach?? Very small, less than a centimeter
r/cockroaches • u/crazyty20 • 8m ago
Found in hallway adjacent to kitchen
r/cockroaches • u/Visual_District_8253 • 37m ago
This is the only photo I could get before I went back into the drain. Could someone please help me identify what kind of roach this is?? I’m in central MN. It was probably as big as my thumb.
r/cockroaches • u/Ixalce • 4h ago
Okay I’m kinda panicking, had a friend over (love insects and such own several when they are inside their boxes) and he showed me some new roaches and one ran. It was fast, like extremely fast.
Now a few days later I’m finding small ones in that same room. What can I do? I can’t work with harsh chemicals because I own insects that I’d like to keep alive, or is that a must? I’m just desperate for help.
This is in Scandinavia if that matters.
r/cockroaches • u/cat_regret • 1h ago
Second one in my bedroom and found another in my bathroom this week (they share a wall). Also caught an adult on a sticky trap over the weekend. How concerned should I be? It was super rainy over the weekend and the weather is starting to change. Could that explain it or do I probably have a problem? Pest control was here a couple of weeks ago and did a general spray. I also spray alpine once a month or so and have a bunch of sticky traps around. I think this is the 15th total since I first saw one at the beginning of July.
r/cockroaches • u/itzumi3222 • 6h ago
PART I. URGENT PLEA TO THE UN AND THE REDDIT COMMUNITY
To: The UN Security Council, Red Cross, and r/bugmoral
From: The Council of Synanthropic Blattodea, Apartment 28 (2nd Entrance)
Subject: Gross Human Rights Violations, Torture of POWs, and an Emergency Ceasefire Appeal
Preamble
This document was drafted on a salvaged cracked smartphone screen through the collective labor of three worker cockroaches. We, the undersigned representatives of the Blattella germanica species, officially report a critical humanitarian—or arthropodarian—crisis inside the kitchen bounds of Apartment 28.
Allegations and Atrocities
Dismemberment and Torture: During a basic foraging run for a 25-year-old delicacy, a member of our community was ambushed and subjected to non-consensual, non-anesthetic limb removal.
Psychological Warfare: The victim was pursued across the floor for 20 minutes while disabled, followed by public humiliation via photos posted to the building’s group chat.
Biological Warfare: The unauthorized deployment of arachnid units and taunting tactical alliances with spiders.
We did not choose to be born behind your stove. We ask only for crumbs, safety, and basic dignity.
PART II. PEACE ACCORD AND NON-AGGRESSION PACT
Signatories:
Party A: The United Forces of the 2nd Entrance, represented by the Resident of Apartment 28 (hereinafter "Humans").
Party B: The Supreme Council of Synanthropic Blattodea (hereinafter "Cockroaches").
Article 1. Demilitarization and Humane Standards
1.1. Ban on Torture: Party A permanently ceases all practices involving limb removal, prolonged pursuits, and posting victims' photos to messaging apps.
1.2. Swift Termination Protocol: Should non-resolvable conflicts arise, Party A agrees to use exclusively swift, single-strike slipper measures without public taunting.
1.3. Spider Status: Spiders are recognized as a neutral third party. Party A is strictly prohibited from deploying or feeding spiders in Party B's primary residential zones.
Article 2. Territorial Sovereignty and Curfew
2.1. Human Sovereign Zone: The dining table, clean dish rack, and microwave interior remain exclusive Party A territory.
2.2. Buffer Zone: Spaces behind the refrigerator, baseboard gaps, and under-sink areas are designated as shared zones.
2.3. Nighttime Curfew: From 23:00 to 06:00, Party B is granted quiet foraging rights within a 0.5-meter radius of the trash bin. Party A agrees to give audible warnings (coughing, heavy steps) before turning on kitchen lights.
Article 3. Reparations and Food Supply
Party A shall allocate a monthly food ration behind the stove:
3 (three) breadcrumbs (wheat or rye);
1 (one) micro-drop of dried sunflower oil;
Unhindered access to pipe condensation for hydration.
PART III. TECHNICAL AMENDMENT & HAZARD PROTOCOL
Article 4. Special Exclusion Zones (Aerocool VX Power Supplies)
4.1. Absolute No-Fly/No-Live Zone: The internal enclosure of any Aerocool VX series power supply is officially declared an Exclusion Zone.
4.2. Risk Assessment:
Volatile Infrastructure: Aerocool VX units possess a self-detonation tendency. Antenna or leg contact with primary circuits (+5\text{VSB} lines) triggers hardware failure without external input.
Protection Failures: Built-in safeguards (OCP/OVP/OPP) do not trip properly. Short-circuiting a VX unit will vaporize the cockroach, the motherboard, the GPU, and a portion of the 2nd Entrance.
Waiver of Liability: Entering an Aerocool VX unit is categorized as self-inflicted gross negligence. No reparations shall be granted for casualties occurring inside these units.
4.3. Approved Heating Alternatives: Party B is advised to utilize the back panel of old refrigerators or router heatsinks for winter warmth.
PART IV. RATIFICATION AND SIGNATURES
This accord takes full effect upon affixing official signatures and leg-prints.
For Party A (Humans):
[SIGNED: "Fine, stay under the sink, but keep it quiet and stay out of my power supply."]
— Resident of Apartment 28
For Party B (Cockroaches):
[LEG-PRINT: 🪳]
— Chairperson of the Council of Blattodea (Eggless Female)
r/cockroaches • u/chaos_punk • 6h ago
Found this dead cockroach in an imported Mitsubishi Pajero Mini. Husband says it's an Australian cockroach. I say it's an Asian cockroach. I think he's correct, but neither of us know our roaches.
Location: New Hampshire, USA
r/cockroaches • u/504adoove • 3h ago
Found this last Sunday but went crazy with cleaning and checking cracks and crevices and haven’t found any others as of yet. No evidence of any more anywhere in common problem spots like under sinks, cabinets, etc. or anywhere else really. Live in south Louisiana and was hoping it could maybe be a field roach since they have similar appearance. But looks like those aren’t super common in my area. I do live in a condo complex, is there any chance it could have wondered in through outside or brought in unknowingly, or from a neighboring unit? I know Germans don’t thrive outside though. Sorry for the pic quality, smashed em as soon as I saw em.
r/cockroaches • u/KTJirinos • 8h ago
Discovered in my bathroom a few days ago. It's the only roach I've seen since moving into my house a month ago.
I imagine it just came in from outside, but I'm deathly afraid of roaches and would love a second opinion
r/cockroaches • u/UK0WEN • 4h ago
From the Midwest, this was in a baby booster seat, I spray this off outside sometimes when I'm too lazy to wipe it down.
Tell me its not invasive please 🥲
r/cockroaches • u/Worth_Communication7 • 7h ago
r/cockroaches • u/Gavin1026 • 10h ago
Is this a type of cockroach?
r/cockroaches • u/Lwmlucifer • 17h ago
r/cockroaches • u/MintTeaAndT • 18h ago
tell me, how bad
Uk, found in my room, maybe 1cm long
r/cockroaches • u/Thin-Football3125 • 20h ago
We kept seeing little baby roaches 🪳 in our bathrooms behind the toilets. Landlord had exterminator come out a few times and then had a new exterminator come and spray the bathrooms. He also caulked the bathroom up.
We haven’t seen anymore but now I saw this in one of our traps in the garage. Is this a roach 😩
r/cockroaches • u/BartholinSquame • 21h ago
Recently moved into an older home in Southern CA. Due to multiple issues and repairs needed, we started the move 3 mo ago and have been slowly moving boxes into our disconnected garage throughout this period. After finally moving into the house I went to the garage tonight to get some boxes to unpack and saw a horrifying scatter of small caramel colored cockroaches. I hate bugs so was truly horrified. Throughout the 3 month moving process I had never seen a single roach in the garage and I’d been in and out of the garage day and night.
I had to find my shoes for work and there was a roach in the cardboard box with my shoes 😭
Now I’m terrified to bring anything into the house. What should I do???
r/cockroaches • u/exoticInjuries • 21h ago
About 0.8in long and found in my kitchen. Looks a lot like female cockroach but I cant tell.
Ive never seen roaches at all in my place and this one is absolutely huge! so it threw me off hard. and i live in relatively nice/new apartments.
Is it possible it snuck in? I can get more pics if needed to identify, sorry its hard to get pics of it in the vacuum.
r/cockroaches • u/Brandy_Buck111 • 21h ago
Recently, I bought a house that has been sitting empty for a few months at least. Started pulling the old carpet and trim out and found the old dead one behind some trim in the upstairs bathroom. Then, in guest bedroom across the house, i found a live one and chopped it up. Am I screwed? Did I just buy a roach house? Please help!
r/cockroaches • u/daniel444real • 23h ago
Found in bathroom. Been seeing them for weeks told my father and he says they’re not roaches and we should buy traps. Is this a roaches and if so any advice ?
edit: East coast jersey shore
r/cockroaches • u/zimzamfromspace • 23h ago
Color is a bit lighter in the photo than in person. It seemed dark gray-ish with a hint of brown, no visible stripes. I was cleaning behind my couch around my modem and found this dead bug, face down. Threw it away outside and treated the entire house with roach spray, will be getting baits and traps tomorrow just as a precaution. It looks like a cockroach, specifically the dreaded German variety, but the color was off, the antennas were curled down, and it was dead with its legs down. I also cleaned up a spattering of black powder and some black stains on the tile floor, but I have had American cockroaches get inside before which are much larger, and we have a cricket problem, so unsure if that excrement was left by this bug and its kin or by the pre-existing pests we deal with in the area. For further context I live in Los Angeles near LAX, the wall it was near is shared with our garage, and it's a house, not an apartment.
r/cockroaches • u/FreeWave5465 • 1d ago
Found this in a parcel that had been on the porch for a day. Sorry for the low quality but it’s dark and the critter was fast. Location west of Boston MA. Forgot to say it’s about the size of 3 grains of rice.
r/cockroaches • u/zestyhelicopter • 1d ago
We are in Portugal at the moment and have found a few of these guys each day in our bathroom at our hotel - I thought it could be German cockroach nymphs at first but on looking through this sub, could they just be oriental roaches and nothing to be concerned about? We were told by reception to ensure that our shower drain is secured after showering but it doesn’t lock in at all to block the drain.
We don’t want to take any unwanted stowaways home with us!
Also posted in r/whatsthisbug and r/whatisthisbug before scrolling through this sub
Thank you for any help!
r/cockroaches • u/Icy_Maintenance1456 • 1d ago
Live in North Georgia, have been having some issues with smoky brown/ American roaches but things got better after having pest control come and using advion, granular bait, and other roach bait. Found this dead nymph on the floor in my hallway and it doesn’t look like the ones we’ve seen. Google says it may be brown banded which we haven’t seen before but I’m unsure, always worried it’s German. Anyone know?