The North American Bat Monitoring Program in the Pacific Northwest

The Bat Hub is coordinating Oregon’s monitoring effort with future expansion into Washington and Idaho has been coordinating monitoring across Oregon, Washington, and Northern California and is expanding its scope to include Idaho this summer.

Welcome to the Northwestern Bat Hub Monitoring Results Viewer!

  • This interactive map will be a useful tool for those who are looking for detailed lists of bat species composition in a given area in the Pacific Northwest or those who want to follow the results of our collaborative monitoring.
  • The data in this tool combines our confirmed acoustic detections with historic range maps and predictive models. Use this viewer to explore findings and extract species lists and other results. For more information about our sources, see below.

Access the Viewer


Our collaborative effort brings together several partners including OSU-Cascades, Oregon Department of Fish and Wildlife, U.S. Forest Service, Bureau of Land Management, U.S. Fish and Wildlife Service, U.S. Geological Survey, National Park Service, CA Dept of Fish & Wildlife, WA Dept of Fish & Wildlife, ID Fish & Game and volunteers to build off the successes of the original Bat Grid and continue this effort into the future.

I'm Interested!

The Bat Hub is continually looking for partners who are willing to participate in the state and region-wide monitoring effort. Please email the Bat Program Coordinator if you are interested or would like more information

The current version of the Bat Monitoring Data Viewer provides the following layers:

  • Expected range: This layer provides a list of species for each grid cell based on best-available range maps.
    • Rodhouse, T.J., Ormsbee, P.C., Irvine, K.M., Vierling, L.A., Szewczak, J.M., and Vierling, K.T. 2015. Establishing Conservation Baselines with Dynamic Distribution Models for Bat Populations Facing Imminent Decline. Diversity and Distributions 21.12 (2015): 1401-413. doi:10.1111/ddi.12372
    • U.S. Geological Survey – Gap Analysis Project. 2018. U.S.Geological Survey – Gap Analysis Project Species Range Maps CONUS_2001: U.S. Geological Survey data release,
    • Rodriguez, R. et al. 2015. Western Bat Working Group.
    • California Department of Fish and Wildlife. California Interagency Wildlife Task Group. 2014. CWHR version 9.0 personal computer program. Sacramento, CA.
    • Smith, Gregory M., and David L. Waldien. 1999. First Records of Brazilian Free-Tailed Bats (Tadarida Brasiliensis) in the Willamette Valley, Oregon. Northwestern Naturalist 80.3: 113-14.