Order Rodentia, Family Muridae, Subfamily Arvicolinae
Habitat:
Marshes and ponds.
Diet:
Herbivore.
Habitats:
Aquatic.
Identification:
Tail slightly flattened for swimming; large compared to other members of its family.
Total length: 41-62 cm; tail: 18-30 cm; mass: 540-1800 g.