OPAL Biodiversity Survey


What’s living in your hedge?

Schoolchildren conducting hedgerow survey

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

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.
  • 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.

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:

OPAL, Centre for Environmental Policy,
Imperial College, South Kensington,
London SW7 2AZ.

Downloads – what you need to get involved

Survey pack

Also available:

Download all the resources above in a single ZIP file:

Looking for the Welsh language survey pack?

Group leaders and schools

Download our group leader support guide, example risk assessment, and our new recording sheets for schools.

By downloading this survey you agree to the terms and conditions for the OPAL Biodiversity Survey

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: