Now the reserve plans to take part in the volunteer-led national harvest mouse survey run by the Mammal Society in the hope of officially confirming the presence of the “wonderful little creature”.
“It will be so amazing if we do have a nationally-scarce species like this on the reserve, discoveries like this make our community land even more special as a haven for people and wildlife,” Jenny said.
The harvest mouse surveys will be held every Wednesday in February between 10:00 and 12:00.
Harvest mice used to live all over the UK, but now there are fewer of them because farming practices have changed, which has led to their natural homes disappearing.
Last year, wildlife television presenter Chris Packham praised two teenagers who had been trying to increase their numbers by breeding them at home.