The western spotted bat (Euderma maculatum) is the only bat in Canada with a readily audible echolocation call. In Canada, it is restricted to arid, low-elevation valleys in the dry interior of southern and south central British Columbia. This bat is designated as a vulnerable species based on its rarity, limited discontinuous distribution throughout its range, and its specialized diet and roosting requirements. This report describes the bat's general biology, habitat, geographic distribution in North America and British Columbia, population size and trend, legal protection status, and factors limiting the size of the bat population. The report ends with a note on the special significance of the species and an outline of management options aimed at protecting the species and its habitat.