Oregon’s western heather vole records come from the high country, and the place names say it plainly: Eagle Cap Wilderness in the Wallowas, Mount Washington and Three Sisters in the Cascades, Gearhart Mountain in the south. Linn and Lane counties, which together take in a long stretch of the Cascade crest, account for nearly half of the state’s 66 reports. The coastal lowlands barely figure.
Reports run from May through September, cresting in July. That’s not a statement about when the voles are busiest; it’s when their habitat is reachable. Snow closes the subalpine meadows and heathery slopes this vole favors for much of the year, and trappers and hikers alike work around that.
NatureServe ranks the species S4, apparently secure, in Oregon. The scattered wilderness clusters suggest an animal distributed along the state’s mountain spine rather than concentrated anywhere, and the modest record count mostly reflects how few people set a trap line near treeline.
Full species profile
