Columbia Gorge Hesperian – Oregon Conservation Strategy

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Overview

Species Common Name Columbia Gorge Hesperian
Species Scientific Name Vespericola depressa

Ecoregions

West Cascades

The West Cascades ecoregion extends from east of the Cascade Mountains summit to the foothills of the Willamette, Umpqua, and Rogue Valleys, and spans the entire length of the state of Oregon. It is largely dominated by conifer forests, moving into alpine parklands and dwarf shrubs at higher elevations.

Special needs

The Columbia Gorge hesperian prefers talus or basalt habitat with minimal vegetation cover. In dry, open basalt talus, these snails are often associated with seeps and springs at lower elevations.

Limiting factors

The Columbia Gorge hesperian is especially vulnerable to habitat loss and roadside spraying. This species has limited distribution and is endemic to the Lower Deschutes and/or Columbia Gorge.

Data gaps

Assess distribution. Determine species-specific habitat requirements.

Conservation actions

Maintain appropriate habitat. Minimize impacts from talus mining to Columbia Gorge hesperian.