California holds just 2 red tree vole records from 2000 to 2026, both from Del Norte County in the state’s far northwest corner. Both sit in GBIF, and one also appears on iNaturalist. That’s too few to say anything about where in California the species is concentrated.
The two dated records fall in May and June, a pair that can’t describe a season. A vole that spends most of its life high in the conifer canopy rarely gets trapped or photographed, so the gap says more about how hard it is to document than about when it’s active.
Oregon is the only other state in its US range, which leaves California at the southern end of a small, forest-bound distribution.
Full species profile
