Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Basal Hollow Roost Selection

Townsend's big-eared bat researchers in the field.


June 2017 - June 2019


Basal Hollow Roost Selection project addresses a lack of information and roosting habitat for Townsend's big-eared bat (Corynorhinus townsendii, COTO) and other bat species identified as Species of Greatest Conservation Need in the California Department of Fish and Wildlife 2015 State Wildlife Action Plan. The purpose of this study is to determine the extent of use of basal hollows by COTO and other bat species and to provide land managers with specific criteria to identify and protect COTO roosting habitat.


Current Staff

Federal Staff: 1

Masters Students: 10

Phd Students: 0

Post Docs: 0

University Staff: 1

5 Year Summary

Students graduated: 10

Scientific Publications: 4

Presentations: 23



  • Margaret WilzbachCo-Principal Investigator
  • Amon ArmstrongStudent
  • Mark HendersonCo-Principal Investigator

Funding Agencies

  • California Department of Fish and Wildlife


California Cooperative Fish and Wildlife Research Unit Cooperators

  1. California Department of Fish and Wildlife
  2. Humboldt State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey
  5. Wildlife Management Institute