The best time to do this survey is from March to September.
Discover the world of worms and contribute to valuable research
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.
Ready to enter your results online?
Once you've completed the survey, simply submit your results using the online form.
Problems entering your survey results online?
Send your results to: FREEPOST RSCH-CHYJ-HYYC, OPAL, Centre for Environmental Policy, Imperial College, South Kensington, London SW7 2AZ.
Need more pH strips?
Email your address and the number you require to firstname.lastname@example.org
Survey downloads – what you need to take part
|Field guide (PDF, 949KB):
Instructions and earthworm identification guide
|Field notebook (PDF, 1.5MB):
Background information and recording sheet
You may download these documents for use in the context of the OPAL project only. All other rights are reserved.
Looking for the Welsh language survey pack? Visit the Welsh Soil Survey page.
Do you know your lob worm from your brandling worm? Get in the know with our online guide.
Your earthworm pictures
See the pictures you've sent in from across the UK. Get snapping and send us your photos.
Play Earthworm Frenzy
Test your reaction speeds and try to catch as many worms as you can in the time limit.
Children's activity sheets
Make your own wormery with the soil and earthworm activity sheets available in our Kids Zone.