A severe drought in Kenya is putting giraffes, zebras and other animals at extreme risk. Can you help get water and food to these starving animals? Find out more here or donate to help the grazing wildlife here.

Home // Key species and habitats // Hazel dormice // Surveying and monitoring hazel dormice // National Dormouse Monitoring Programme (NDMP)

National Dormouse Monitoring Programme (NDMP)

The NDMP monitors the long-term dormouse population trend. Each site contains a minimum of 50 dormouse boxes installed in a woodland or hedgerow. They are checked at least twice a year, in May or June and September or October between the 15th and 25th of the month. The number, sex, weight and age of dormice found are recorded and we collect the results, which together give an indication of The State of Britain’s Dormice.

If you find a dormouse carcass please use the dormouse carcass submission form and label to send the body for post mortem examination.

Read our current advice for monitoring dormice in the presence of SARS-CoV-2.


Set up a site

To set up an NDMP site, it must contain dormice and you’ll need landowner permission for long-term monitoring. A disturbance license is required for box checking. Additional help for licensees, trainers and trainees is available here. We may be able to provide dormouse boxes at a nominal cost as part of our dormouse box scheme. Register your site with us by completing the NDMP site registration form. Registered monitors can download the NDMP guidelines and forms 2021 and enter data online. Please ensure all data is entered by the end of the year.

Monitors are emailed Dormouse Tales on all things dormouse four times a year and you can sign up to an online dormouse discussion forum. Please contact

We are extremely grateful to all our dormouse monitors for their contribution to the programme and to our partners at Natural England. 

How does your site compare?

You can compare how well your site is faring with our site at Briddlesford Woods on the Isle of Wight.

Total number of dormice in spring and autumn recorded in UK regions compared with Briddlesford per 50 boxes.

Total number of mature dormice in spring and autumn recorded in UK regions compared with Briddlesford per 50 boxes.

Total number of litters of dormice in spring and autumn recorded in UK regions compared with Briddlesford per 50 boxes.

Data can be input online here:

We have been working to save hazel dormice in the UK for over 20 years. Find out about our campaigns and how you can help.

Back to Protection for hazel dormice

Back to Hazel dormouse conservation

Let's keep in touch...

We'd love to tell you about our conservation work through our regular newsletter Wildlife World, and also how you can save endangered species through volunteering, taking action or donating. You must be 18 or over. The information that you provide will be held by People’s Trust for Endangered Species. For information on how PTES processes personal data, please see our privacy policy.

People's Trust For Endangered Species

People's Trust for Endangered Species, 3 Cloisters House, 8 Battersea Park Road, London SW8 4BG

Registered Charity Number: 274206 • Site Design: Mike Leach Creative at Waters • Branding: Be Colourful

Copyright PTES 2022

- Enter Your Location -
- or -