Water vole sanctuary created in Bridport
A water vole sanctuary is being built on a Dorset river.
A pond is being restored and an island created on the River Brit at Bridport by the Environment Agency to give the endangered mammals a refuge.
The Environment Agency said the protected animal was "fast disappearing" due to habitat loss and predators.
The water vole sanctuary at Allington Pond is expected to take around a week to complete.
The agency said the work would provide a valuable habitat for the water voles to take cover.
Once a common sight in the county, the species is now only found in a "tiny fraction" of rivers and streams, the agency said.
The UK's water vole population has dropped 90% since the late 1980s, making it the UK's fastest declining mammal.