What is the typical diameter range for observable water vole burrow entrances along the bank?
Answer
10 to 30 centimeters (4 to 12 inches)
Examining the bank for physical evidence often leads observers to the entrances of water vole burrows. These entrances are characteristically sized, usually measuring between 10 and 30 centimeters, which translates to 4 to 12 inches, in diameter. Locating entrances of this dimension within dense tussocks of grass provides a strong indication of active use. A healthy system will often feature multiple entrances, creating distinct pathways or runways leading directly toward the water source.
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