OPAL Biodiversity Survey

Data entry for the OPAL Biodiversity Survey is now closed.  However, survey resources and identification guides can still be downloaded for free below. 

Thank you to all those who took part in the survey!

Survey data submissions can be viewed on the OPAL Data Explorer. In addition, Biodiversity Survey data will soon be available for download from the OPAL website.


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.

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.

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.

Downloads – what you need to get involved

Survey pack

Also available:

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: