Distribution of Plecotus townsendii and associated bat species in Baker, Grant, Malheur and Morrow counties of Oregon. Final Report

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A two year survey of bat distribution, habitat affinities, and populations in seven eastern Oregon counties is reported. Surveying included searches of typical bat habitat (caves, mines) in both winter and summer, mistnetting, and checking buildings and bridges for night and nursery roost sites. In addition, museums not surveyed by Maserand Cross (1981) were visited or contacted by letter for any applicable bat records. A total of 12 bat species were encountered at least once. Plecotus townsendii was emphasized. Four populations of this species were noted; all used caves or mines for hibernacula and [for] day and night roosts. Populations noted varied from two bats in northern Malheur County to 500+ in southern Malheur County. New bat records were obtained for at least 6 counties. Habitat affinities, records from each site, distribution maps, and management recommendations are included. [A few bat sightings are reported from Idaho.]

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ELECTRONIC FILE - Zoology: Mammals

Citation: Perkins, J. M. 1988. Distribution of Plecotus townsendii and associated bat species in Baker, Grant, Malheur and Morrow counties of Oregon. Final Report. Oregon Department of Fish and Wildlife. 69 p.

NOTE that our copy includes the letter dated 15 Jan 1988 from Perkins to Craig Groves (IDFG, Idaho Natural Heritage Program) that accompanied the report. It points out the Hells Canyon work that produced some Idaho sightings and mentions a proposal he's working on for future bat work in Oregon and Idaho.