Biodiversity Survey – join in now


The best time to do this survey is from April to November.

What’s living in your hedge?

Take part in the OPAL Biodiversity Survey and uncover the diverse range of wildlife in our hedges. You’ll contribute to valuable research and learn more about the importance of hedges and how you can improve them.

Hedges support many animals by providing food and shelter. Berries and seeds are food for birds, while holes beneath the hedge are often home to small mammals. You’ll also discover many invertebrates living among the leaves.

By telling us what you find, we can instantly rate the condition of your hedge and offer suggestions on how to improve it.

How to take part

Step 1: Download the easy-to-follow instructions and guides in English, below, or in Welsh.

Please show care and respect to our environment.

Many animals rely on hedges for food and shelter.

Step 2: Find a suitable hedge to carry out the survey and answer the questions in the workbook. Use our guide to help you identify invertebrates.

Step 3: Submit your results 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-CKYJ-HYYC, OPAL, Centre for Environmental Policy, Imperial College, South Kensington, London SW7 2AZ.


Downloads – what you need to get involved

Hedgerow Identification Guide (PDF, 892KB) – background information and recording sheet

Biodiversity Survey Booklet (PDF, 1.5MB) – full instructions

Invertebrate guide (PDF, 2.9MB) – a guide to common invertebrates

Group leader guidance (PDF, 253KB) – a guide for group leaders wishing to carry out the OPAL Biodiversity Survey

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 Biodiversity Survey page.


Identify with iSpot

Need help identifying your finds? Try the iSpot community.

Hedge fun and games

Enjoy survey-themed fun and games in our Kids Zone.


Policy and regulation
To find out about the current health of UK biodiversity and Government plans to protect wildlife, visit: