BC List Status:
Red (Candidates for- Extirpated, Endangered, or Threatened status)
The large size, thick white shell aperture, and often bleached flaking appearance distinguish Oregon Forestsnail from most other land snails. Inexperienced observers will most likely confuse the introduced European Grove Snail (also called Brown-lipped Snail) which has become widely distributed especially in urban and rural areas of BC. Highly variable in shell colour and pattern, Grove Snail shells range from solid shades of dark brown or amber/yellow to shells with dark bands on yellow or grey. The closely related Puget Oregonian is almost the same size and also possesses a defined tooth on its shell aperture; but is believed to be extirpated from its historic range in BC. Pacific Sideband, though larger and more colourful, can have bleached, flaking shells as the snail matures. Northwest Hesperian, another native land snail is smaller (shell diameter <1.6 cm) and covered with short hairs, noticeable when the shell is held up to light. However these hairs can disappear with age. Many of these snail species can be found together so close examination is needed for proper identification.
Habitat loss and fragmentation due to urbanization, logging, and clearing.
Direct mortality, alteration of forage plant communities, and loss of essential habitat features due to recreational activities (e.g. ATV use, mountain biking, hiking).
High vulnerability to activities that impact microclimate conditions (e.g. moisture), decrease food supplies, and create barriers to dispersal (e.g. land clearing, extensive paved areas). Land snails have low tolerance to drying and exposure and poor disp
Possible competition from introduced species such as European Grove Snail and Brown Garden Snail.
Alteration of forage plant communities and microclimate conditions due to the introduced invasive and exotic plant species.
Apply conservation and management objectives as set-out in the “Recovery Strategy for the Oregon Forestsnail (Allogona townsendiana) in Canada (2016). Integrate complementary objectives, recommendations and assessment methods found in “Draft Gastropod Best Management Practices Guidebook Oregon Forestsnail and Other Land Snails at Risk in the Coastal Lowlands” 2010(found on the SCCP’ website). Where appropriate, measures as set out in the RISC Standards #40 “Inventory Methods for Terrestrial Arthropods” should be applied. Habitat suitability mapping as done for “Big Leaf Maple distribution for Puget Oregonian” found in the “Recovery Strategy for the Puget Oregonian Snail (Cryptomastix devia) in Canada” may also be a useful for Oregon Forestsnail. Oregon Forestsnail may occur under different habitat conditions than known, assessments may need to be conducted outside of the known habitat types and range.
This species is federally listed under the Species at Risk Act (SARA), habitat may be subject to protections and prohibitions under
the BC Wildlife Act and may also be governed under other provincial and federal regulations including the Fish Protection Act and
Federal Fisheries Act as well as Regional and local municipal bylaws.