Discover the world of worms and help build a picture of the nature of soils across the UK
The best time to do this survey is from March to September.
Earthworms are extremely important and play a vital role in recycling plant nutrients and aerating the soil.
By taking part in this survey, you'll help improve our knowledge of earthworms and the soils they live in – something we know surprisingly little about.
How to take part
Taking part is simple and fun. Don't worry if you are unable to answer all the questions, your results are still valuable to us even if you don't find any worms!
- Step 1 – Download and print the documents in English below, or in Welsh, ideally in colour.
- Step 2 – You'll also need a few everyday items including pH strips, mustard, vinegar and a ruler.
- Step 3 – Find a suitable area and start looking for worms!
- Step 4 – Tell us what you find using our simple online form.
Enter your results online
Once you've completed the survey, simply submit your results using the online form:
Downloads – what you need to take part
- Soil and Earthworm Survey Booklet (PDF, 1.6MB)
Instructions and earthworm identification guide.
- Earthworm Identification Guide (PDF, 845 KB)
Background information and recording sheet.
- Soil Survey recording sheet (PDF, 155 KB)
Easy-to-print recording sheets (black and white).
Looking for the Welsh language survey pack?
By downloading this survey you agree to the terms and conditions for the OPAL Soil and Earthworm Survey
Download our group leader support guide, example risk assessment, and our new printable black and white recording sheets.
Do you know your lob worm from your brandling worm? Get in the know with our online guide.
Children's activity sheets
Make your own wormery with the soil and earthworm activity sheets available in our Kids Zone.