Degree of Threat: Medium
Comments: Probably most important to the survival of A. townsendiana in Canada is: 1) that the species has a limited, patchy distribution; and 2) that it lives in and adjacent to some of the most heavily modified and utilized land in British Columbia. Agricultural uses, logging, and most recently urbanization pose threats to the populations. Subpopulations of snails are becoming more isolated than historically, as habitat is lost and fragmented. In addition to isolating demes, habitat fragmentation can be expected to further degrade microhabitats, thus rendering the snails more vulnerable to natural predators and climatic fluctuations (COSEWIC, 2002).