Torpid dormouse found on my box check in June

Importance of amateurs in improving our understanding of dormice

It’s not often that my day job links, even tangentially, with my enthusiasm for wildlife (see this post on the badger cull for a rare exception to this). But I spent the other morning teaching undergraduates the importance of involving patients and the public in clinical trials. As we discussed the different sorts of impact this involvement can have, it reminded me of a recent talk I heard about dormice by Pat Morris.

OK, the link isn’t obvious, but bear with me. Pat Morris is one of the country’s leading experts on dormice. His talk wasn’t so much about the natural history of dormice, as the (surprisingly short) history of the study of hazel dormice. What really struck me was the importance of amateurs in that history.

When Pat turned his attention to hazel dormice (having decided to move on from hedgehogs) very little was known about them. By the early 1980s there were only three scientific papers on hazel dormice. This dearth of knowledge was because they are so difficult to study. They don’t go into traps like other small mammals. And being nocturnal arboreal mammals, you won’t see any if you go out looking for them. So how, apart from chance encounters, could scientists study them?

It was amateur wildlife enthusiasts that discovered two of the key ways that we now use to search for or monitor dormice populations.

  1. nibbled nuts: as the name suggests, Hazel dormice are partial to
    Nut nibbled by a dormouse. Note the smooth inner surface of the hole, and the scratches outside the hole.
    Nut nibbled by a dormouse. Note the smooth inner surface of the hole, and the scratches outside the hole.

    hazel nuts. A sharp-eyed amateur noticed that it’s possible to distinguish between a nutshell that’s been opened by a dormouse and one opened by other small mammals (see How to tell who’s been nibbling your nuts). If you can find a nutshell that’s been nibbled by a dormouse, you know there must be dormice present in your wood, even if no-one ever sets eyes on one.

  2. dormouse boxes: Doug Woods, a keen
    A newly installed dormouse box (Chateau Dormouse, as the child who helped make it called it)
    A newly installed dormouse box (Chateau Dormouse, as the child who helped make it called it)

    birder who monitored woodland bird breeding noticed that dormice would sometimes build nests in bird boxes. By adapting bird boxes to discourage birds and encourage dormice (putting the entrance hole at the back of the box, next to the trunk), he developed a monitoring tool that allows us to see and measure dormice.

 

The amateur contribution to the study of dormice didn’t stop at discovering the research tools. Hundreds of volunteers have helped to collect data about dormice using these tools.

The Great Nut Hunt of 1993 was a pivotal moment in the study of dormice in the UK. Volunteers across the country got on their hands and knees in woodlands, searching for dormouse nibbled nuts. They found 300,000 nuts, which showed that during the 20th century dormice had disappeared from half their range (based on where historical observations had been recorded).

The important contribution of amateurs continues to this day. Many of the people who volunteer to check dormouse boxes each month for the National Dormouse Monitoring Programme are, like me, amateur enthusiasts. The programme now has around 400 sites, and dormice are the only terrestrial mammal being monitored nationally every year in the UK.

This talk encouraged me – even as a volunteer giving a few hours each month, I can help to increase our knowledge about our native wildlife, which will hopefully mean we can get better at protecting it. At work I have seen some striking examples of people who aren’t medical professionals or scientists making vital contributions to our research. It seems to be the same in conservation. We ignore the insight of people with a passion at our peril.

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