Ccrrots and apples are bing used to lure around 30 voles discovered at Crossness Marshes beside Crossness Sewage Treatment Works. Apparently they have been living in sludge lagoons and a 26m (85.3ft) ditch.
The voles will be taken to the Wildwood breeding centre in Kent where they they will stay for the next two years.
Martin Wagner, Thames Water's conservation manager, said
With work due to start soon on the planned extension to the works, we wanted to make sure these voles were not disturbed or hurt in any way.
They're likely to stay there [at the breeding centre] for about two years where we hope their numbers will increase.
They will then be brought back to Crossness to enjoy new reed ditches specially created for them.