|A Water Vole|
Water voles inhabit the edges of ditches, streams and rivers and make their burrows in the soft riverside banks. They feed on the reeds and grasses found nearby. The feeding and burrowing activity of voles creates favourable habitat alongside river edges for other animals and plants such as Kingfishers, who often use Water Vole excavations for nests. The impacts of the loss of this habitat on Water Voles is huge, and it has been exacerbated by predation from North American Mink.
The North American Mink is not native to Britain, but they are now widely established throughout the UK, largely due to escapes and releases from Mink farms in the 1950’s. Mink can have a devastating impact on our native fauna, and the decline in Water Vole populations is directly linked to predation by Mink. Mink are successful predators of Water Vole because they can swim well and are small enough to enter Water Vole’s burrows.
|A Water Vole in the Lower Windrush|
Monitoring for the presence and control of Mink is carried out in the Lower Windrush Valley using Mink rafts provided by The Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust (BBOWT). The rafts have a tray of soft clay, positioned in areas where Mink are likely to be present. The Mink pass across the clay and leave footprints, indicating their presence. Possible Mink prints were recorded in ten different areas of the Lower Windrush Valley during a 2016 survey.
|Mink prints on clay from a raft near Standlake|
There are currently Mink rafts in the Ducklington area but controlling populations in the lower end of the Windrush is particularly important to reduce the number of Mink travelling upstream from the River Thames.
New Mink rafts in place!
As of May 2019, a further three Mink rafts are now in place and a new team of volunteers have begun to monitor the rafts on a weekly basis. If Mink prints are identified during monitoring visits, then a trap will be deployed. Once a Mink has been captured, it will be humanely killed following best practise guidelines.
|One of the new rafts in position|
|Volunteers helping to put a new raft in position|
Lower Windrush 2016 Survey Report: https://www2.oxfordshire.gov.uk/cms/sites/default/files/folders/documents/environmentandplanning/countryside/protectedspecies/WaterVoleUpdate-LowerRiverWindrush2016Report.pdf
Lower Windrush 2016 Survey Map: https://www2.oxfordshire.gov.uk/cms/sites/default/files/folders/documents/environmentandplanning/countryside/protectedspecies/WaterVoleUpdate-LowerRiverWindrush2016Map.pdf
BBOWT Water Vole Recovery Project webpage: https://www.bbowt.org.uk/wildlife/wildlife-conservation/water-vole-recovery-project