PEST EVIDENCE GUIDE · PRINTABLE WORKSHEET

First pest observation worksheet

Turn an unfamiliar bug, stain, or debris pile into a clear record with photos, location, and unanswered questions.

For: You found something and do not know what it is.

Outcome: A short evidence record you can compare or share.

Observe only from a safely accessible place. Leave suspected animal waste, stinging insects, damaged structures, and concealed electrical spaces undisturbed.

Fill in the fields, then use your browser’s print dialog. Entries are not sent to us or saved by this worksheet. Use the evidence log for a record saved on this device.

1. Record the setting before changing it

The relationship between the clue and its surroundings can be lost when an item is moved. Start with a wide view.

Write the date, room, and exact surface or object.
Note whether this was a first sighting or a repeat at the same place.
Record recent deliveries, repairs, leaks, or movement of stored items without assuming they caused the finding.

Date and time

Room / exact location

What changed recently

2. Describe only what is visible

Separate a direct observation from a possible explanation. “Three brown capsules under a shelf” is more useful than “a severe roach infestation.”

Note approximate number, shape, color, texture, and whether movement was seen.
Take one context photo and one focused close-up if safe. Keep the original files.
Record a measured size only when it can be obtained without touching or disturbing a hazardous clue. Otherwise write “not measured.”

Visible features / movement

Size and how measured

Photo filenames

3. Choose the next question

An incomplete identification is a useful result when it prevents the wrong action.

Use the clue finder to select the closest evidence category.
Compare a plausible alternative, including a non-pest explanation.
Ask what extra observation would separate the possibilities; stop if getting it requires an unsafe inspection.

Possible explanation / alternative

What remains uncertain

Person or resource to contact

Reference guides for this worksheet

Sources and scope

The worksheet structure is an original editorial aid. The resources below inform its identification or management context; they have not reviewed or endorsed this worksheet.

Pest Evidence Guide · September 26, 2026 · https://www.pestevidence.com/toolkits/first-observation

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