Identify the most likely pest from 5 short questions. The tool runs in your browser, scores each pest by how many criteria match your answers, and shows qualitative confidence — strong, possible, or weak match. No fake percentages, no stored data.

1. Where do you see the pest?
2. What does the pest look like?
3. When is the pest most active?
4. What damage or signs have you noticed?
5. Are pests appearing in groups or solo?

How the identifier decides

The tool runs a rule-based score for each of the nine pests covered by this site:

  • Each answer maps to one or more pests with a numeric weight (a strong discriminator like “leaves slime trail” → slugs gets 5 points; a softer signal like “kitchen” → ants gets 4 points).
  • Total score per pest = sum of weights for matched answers.
  • Confidence labels are qualitative, based on number of matched criteria and total score:
    • Strong match: 4 or more matched criteria with a total of 18+ score points
    • Possible match: 3 or more matched criteria with a total of 10+
    • Weak match: 2 or more matched criteria with a total of 5+
    • Below those thresholds, the pest is not shown — the tool prefers admitting it doesn’t know over forcing a wrong answer.

Confidence labels are qualitative — they are not “70% probability” style numbers. Real probabilities for pest identification depend on regional species, climate, and time of year that this tool doesn’t capture.

What this tool does NOT do

  • It does not diagnose pests definitively. For unfamiliar insects or persistent infestations, photograph the pest and consult a local extension service or licensed pest professional.
  • It does not cover every household pest — only the nine with full pages on this site.
  • It does not address agricultural pests, livestock pests, or wildlife (deer, opossums, etc.).
  • It does not replace structural inspection. Some pest signs (termite damage, hidden cockroach harborage) require physical inspection that no quiz can substitute.

Frequently Asked Questions

How does this pest identifier decide?

Each answer maps to characteristics documented on this site's pest pages. The tool scores each pest by how many criteria match your inputs and ranks them by match strength. Confidence is shown qualitatively (strong / possible / weak match) based on the number of matched criteria — there are no fake percentages.

What pests can this tool identify?

The tool covers nine common pests with full pages on this site: ants, aphids, cockroaches, flies (house, fruit, drain), mice and rats, mosquitoes, slugs and snails, spiders, and wasps. If your pest does not match any of these closely, the tool will say so rather than force a wrong answer.

What if multiple pests match my answers?

The tool returns the top three matches ranked by score and shows the qualitative confidence for each. Two strong matches usually means your inputs are too general — answer the appearance and damage questions more specifically and the tool narrows the field.

Can the quiz misidentify a pest?

Yes. It uses surface characteristics that overlap between species — a small flying insect could be a fruit fly, fungus gnat, or midge. For accurate identification of unknown insects, photograph the pest and consult a local extension service or entomologist. This tool is for narrowing down likely candidates, not definitive diagnosis.

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