Water vole surveys
Water voles (Arvicola amphibius) are protected under Schedule 5 of the Wildlife and Countryside Act 1981 (as amended). They can be present in ditches, streams, ponds and lakes.
Water voles can be found throughout mainland UK, although their range and numbers have significantly declined. ADAS ecologists are experienced in advising on the necessary surveys and mitigation required regarding water voles.
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Surveying
A habitat suitability assessment helps to determine if a site could potentially contain a water vole population. Ecologists will look for signs of their presence, including droppings, signs of feeding and burrows.
Water voles tend to have nibbled grass at their burrow entrance and leave piles of nibbled feed near the water edge.
Survey calendar
The ideal times to survey are from April to July. It is also possible to survey in August and September.
If water voles are on site
If water voles are found in a work area and disturbance is likely, we can advise on mitigation options to safeguard this species. This may include trapping and translocation or displacement using habitat manipulation. The actions needed will depend upon the size and permanence of the impact.
If capturing water voles or damaging their habitat is unavoidable, you will need to apply for a conservation licence from the applicable statutory nature conservation body, such as Natural England. ADAS ecologists can do this on your behalf. Please note, mitigation work may not be possible at certain times of the year. We will advise you further on what is possible.
Mitigation calendar
Jan – Feb – No works in channel and on banks, Mar – Apr – Licensed exclusion and works possible, May – Aug – No works in channel and on banks, Sept – Oct – Licensed exclusion and works possible, Nov – Dec – No works in channel and on banks
Potential habitat improvements
It is possible to mitigate impacts to this species with habitat improvements. This can include planting food plants, installing pre-planted coir rolls and rafts and creating ditches and ponds. We can discuss all potential options with you to find the one most suitable.