The mild winter has led to some early arrivals in Gloucestershire.
A litter of seven harvest mice was born at the Wildfowl and Wetlands Trust near Slimbridge earlier this month.
The mice, which are the smallest species of British rodent, are part of the Back From The Brink collection at WWT Slimbridge, which highlights wetland mammals that have been threatened with extinction in the wild.
As the winter has been quite a warm one, they have arrived earlier than expected - normally we wouldn't expect to see them until at least February.
They are growing quickly but even as a fully grown adult they are very small. Visitors enjoy spotting them in their exhibit at Back From The Brink.
They can use their tails to grab branches so they look very acrobatic when they move around.
– John Crooks, Mammal Manager at WWT Slimbridge
Little mouse facts:
At birth harvest mice are the size of a baked bean
At around a month old baby mice have grown to half their adult size
When fully gown Harvest mice are still only 7cm long and weight the same as a 2p coin
Staff at the Wildfowl & Wetlands Trust at Slimbridge say the water levels on the Severn Estuary has risen to the highest level any staff and volunteers can remember since 1982.
The unusually high tide expanded the width of the Severn Estuary considerably ,with waters reaching out an extra half-mile right up to the bank that defends WWT’s buildings and waterfowl gardens against extreme events.
The drama was captured in this timelapse video as the water approached.