Volunteer Stephen Plummer gathered 216 camera clips inside a baited wooden trap in deciduous woodland beside old ponds. Although monochrome infrared video made visual identification challenging, physical markers such as ear placement, snout shape, and tail length helped differentiate the animals. The project revealed how species avoid direct conflict through timing, with daytime-active bank voles taking peanuts before mice arrive. A brown rat also made a brief appearance during the 12-hour recording period.
Key points
Trail camera monitoring inside specialized wooden traps effectively tracks small mammal b…: Trail camera monitoring inside specialized wooden traps effectively tracks small mammal behavior within nature reserves.
Behavioral adaptations like cathemerality allow bank voles to secure preferred food resou…: Behavioral adaptations like cathemerality allow bank voles to secure preferred food resources before nocturnal competitors emerge.
Monochrome footage requires observers to rely on subtle anatomical features and movement…: Monochrome footage requires observers to rely on subtle anatomical features and movement patterns to verify rodent identities.
Sources checked by our analysis pipeline: 1
Bank vole or wood mouse? That is the question. I’m working my way through a series of nine-second videos from Clophill Lakes nature reserve, taking notes on how many bank voles appear in the clips. Unfortunately, I can’t tell my voles from my mice.
The footage begins at 4.47pm, when wildlife volunteer Stephen Plummer switches on the trail camera in his mostela trap: a wooden box with a drainpipe entrance leading to a scattering of nuts and seeds. Both wood mice and bank voles star in the Clophill Saga – a rodential drama set in deciduous woodland beside old ponds – but I’m struggling to tell the two species apart, especially in the monochrome infrared light. I take notes as they enter: BV, 2BV, WM, BV. Or is it WM? I check the differences between them for the umpteenth time – 216 clips later (at 4.46am), I reckon I’ve got my eye in.
If the bank vole’s shorter, stubby tail, low-set ears, stout snout and smaller eyes aren’t visible to distinguish it from a wood mouse, its movements are diagnostic.…
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