Distribution, foraging behavior, and capture results of the spotted bat (Euderma maculatum) in Central Oregon
Rodhouse TJ, McCaffrey MM, Wright RG. 2005. Distribution, foraging behavior, and capture results of the spotted bat (Euderma maculatum) in Central Oregon. Western North American Naturalist. 65(2):215–222
The spotted bat (Euderma maculatinn) has been virtually Unknown in Oregon despite the existence of potential habitat in many areas of the state. In 2002 and 2003 we se, arched for spotted bats along the John Din Deschutes. and Crooked Rivers and tit a remote dry canyon southeast of the city of Bend in central Oregon. The species was documented through the use of mist-nets, it bat detector. and recognition of audible spotted bat calls. Spotted bats were found at 11 locations in 6 Oregon counties. Nightly activity patterns of spotted bats were unpredictable. Spotted bats were found in 78% of search areas but on only 48% of survey nights. We observed spotted bats foraging above fields,aid low it land slopes adjacent to rivers and creeks and along the rims of cliffs. Estimated flying heights of spotted bats ranged front 3 in to 50 m aboveground. The species was difficult to capture and was captured only after considerable experimentation with methods and materials. Three spotted bats were captured toward the end of the project in 2003 and accounted for only 0.5% chill bats captured during the study. Although we attached radio transmitters to 2 spotted bats. we found no roost locations. We believe additional Spotted bat surveys in Oregon are warranted, especially in higher-elevation habitats, but recommend that to increase their effectiveness, surveys accommodate the unique foraging behavior of the species.
- Type
- Journal Article
- Authors
- Rodhouse, Thomas; McCaffrey, Maureen; Wright, R
- Units
- JODA , UCBN
- Keywords
- Absence (Biodiversity), bat monitoring, capture results, Distribution, echolocation calls, Euderma maculatum, Foraging Behavior, Observations, Oregon, Presence (Biodiversity), Spotted Bat, UCBN Journal Article, Vespertilionidae, Vouchers