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Experts have released ten tiny, endangered dormice in Bedfordshire to help save them from becoming extinct.

The hazel dormice population has shrunk by 70% since 2000, and have disappeared from 20 English counties.

One expert said climate change was making it harder to protect the species.

But conservationists are hoping to bring the numbers back up.

Hazel dormice are very difficult to spot, measuring no more than 6–9cm in length.

They typically do not weigh more than 40g.

These tiny creatures prefer to live in woody areas, and by now are mostly found in the south of England and Wales.

In winter the dormice come down from the trees to hibernate, curling up into a ball to sleep for up to seven months.

Conservationists – experts who try to protect animals and nature – bred 10 new dormice to help boost the species.

They've now been released into woodland in Bedfordshire.

At first they will live in nest boxes to help keep them safe, which are filled with leaves, nuts, berries and water.

They will then be released into nature, where the experts hope they will breed with the dormice already living there and help the population grow.

Climate change makes it harder to protect dormice, according to dormouse officer Ian White from the People's Trust for Endangered Species, one of the charities involved in the dormice conservation.

Flooding, warmer winters and wetter summers are all threats to the dormice, he explained.

"But what we can do is make the habitat as good as we can to make it as resilient as we can."

Later this month, another 10 dormice will also be released into woodland in Lancashire.

And earlier this year, a bridge was built for dormice in the Forest of Dean to help connect their habitats.