North American water vole
Rodents
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The North American water vole or just water vole is the largest North American vole. It is found in the northwestern United States and southern parts of western Canada. Wikipedia
Conservation status: Least Concern (Population stable)
Trophic level: Herbivorous
Mass: 2.3 oz
Gestation period: 22 days
Scientific name: Microtus richardsoni
Length: 6.1 in. (Adult)
Source: Encyclopedia of Life