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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.

hazel-dormouse-ndmp-PTES

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 2019 and enter data online. Please ensure all data is entered by the end of the year.

Monitors are sent The Dormouse Monitor update on all things dormouse twice a year and you can sign up to an online dormouse discussion forum. Please contact Susan.Sharafi@ptes.org.

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.


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