Habitat use and population status of Euderma maculatum, the spotted bat, in southern British Columbia - 1987

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From early May until the end of September 1987, we studied Euderma maculatum in the Okanagan Valley of British Columbia. Radio-tracking of four females (67 bat nights) indicated a high level of fidelity to specific roosting sites and foraging areas. There was broad overlap in the use of foraging areas by marked individuals and no evidence of territorial behaviour. The radio-tagged bats spent their entire nights away from the roost flying and foraging, and three of these bats foraged mainly in marshy areas long the wet margin of Vaseaux Lake. By monitoring foraging bats and counting individuals leaving roosts, we estimate the 1987 population of E. maculatum to be 40 individuals, a slight increase from 1986, but still below the published estimates from 1980. We recommend that the roost cliffs be protected from any human disturbance and that further research investigate the seasonal behaviour of E. maculatum by year-round study.

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Reference Code: U87WAI01IDUS

Full Citation: Wai-Ping, V., and M. B. Fenton. 1987. Habitat use and population status of Euderma maculatum, the spotted bat, in southern British Columbia - 1987. Unpublished report prepared for World Wildlife Canada and the Nature Trust of British Columbia. 10 pp. plus appendices

Location: ANIMAL EF: EUDERMA MACULATUM