Endangered hazel dormice to be released into ancient woodland in Lancashire

Rare hazel dormice are to be released into ancient woodland in Lancashire to help the endangered species come back from the brink of extinction.

The species has declined by a staggering 51% since 2000 and are considered extinct in 17 English counties.

The move aims to create a bigger and better-connected population in the North West of England to create a "northern stronghold".

This builds on a previous reintroduction in the same area, in a ground-breaking attempt to create a bigger and better-connected population of hazel dormice in the North West.

Snoring dormouse in hand

In 2021, 30 hazel dormice were released into a woodland in the Arnside and Silverdale Area of Outstanding Natural Beauty,

Now, a further 39 will be reintroduced into a neighbouring woodland which has been carefully selected to support the species.

The reintroduction is led by wildlife charity People’s Trust for Endangered Species (PTES), the National Trust and delivered by the University of Cumbria.

The annual dormouse reintroductions, which are part of Natural England’s Species Recovery Programme, began in 1993, and have been managed by PTES since 2000.

Snoring dormouse in natural nest

This year’s reintroduction will be held in a National Trust owned woodland and is also part of ‘Back On Our Map’ (BOOM) -a multispecies, landscape scale project which aims to return10 locally threatened or extinct native species, such as dormice, to the area.

Prior to the reintroduction all dormice undergo a nine-week quarantine and receive regular health checks.

Both organisations ensure that only healthy dormice are released into the wild ,taking vital steps to mitigate against disease and ensuring that no parasites can be transmitted from the captive bred population to wild dormice.

Snoring dormouse in nest box

Ian White, Dormouse & Training Officer for PTES said: “The only way we can rebuild their populations is to continue managing known habitats correctly to ensure the survival of any existing populations and to carefully release healthy, captive bred dormice into well-managed woodlands.

"We hope this year’s dormice will thrive in their new home, and in time will meet the population we reintroduced last year to create Lancashire’s first self-sustaining metapopulation.”

Dormouse at night

Jamie Armstrong, Ranger for the National Trust said: “Our woodlands have been carefully managed by National Trust rangers and volunteers for decades to ensure that they support a wide range of flora and fauna.

"This work has led to a diverse woodland structure which makes the chosen area the ideal habitat for dormice.

"This, coupled with its close proximity to the 2021 reintroduction site, will hopefully create a thriving population which will spread throughout neighbouring woodlands.”

Ten days after the reintroduction, volunteers, National Trustand BOOM staff will open the mesh reintroduction cage doors to allow the dormice to start exploring their new home.

There are plans to erect a bespoke dormouse bridge over the West Coast Main railway line, connecting the 2021 and 2022 reintroduction sites.


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