Commonly called the water rat, this largest member of the vole family can commonly be found in slow rivers, ponds, streams an ditches. Easily recognised with its hairy tail and rounded face, it has found itself under threat in recent years through the increase in water pollution throughout the country, the deterioration of its habitats and the rise of the mink.
A skilled swimmer that can have several litters in a year, it commonly feeds on grass and vegetation on the waterbanks.