ROOST SELECTION IN A HOARY BAT (LASIURUS CINEREUS) MIGRATORY STOPOVER LOCATION IN NORTHERN CALIFORNIA.
Skye Salganek ; Humboldt State University ; 1 Harpst Street, Arcata, CA, 95521; (505) 610-4282; skye@humboldt.edu; Theodore J. Weller, Joseph M. Szewczak
As North America becomes increasingly fragmented in the Anthropocene, it is important to conserve stopover locations for migratory species and understand the variables that drive habitat selection during migration. The hoary bat (Lasiurus cinereus) is a species that makes seasonal long-distance migrations to access suitable seasonal habitat. Humboldt Redwoods State Park, California is one of the few known locations where hoary bats can be captured in abundance during the autumn. Potential explanations for the capture reliability at this site include its role as a migratory stopover location, an area important to their reproductive biology, or an overwintering site.Our objective was to identify important habitat variables in daytime roost selection and determine occupancy of this area during the winter. In 2017 and 2018, we used VHF telemetry to track 15 hoary bats to 29 roost locations. We supplemented our data with an additional 10 roost locations obtained from three individuals outfitted with GPS transmitters in 2014. Variables from 78 used and available roost sites were extracted by spatial analysis of remotely sensed data. We used multiple logistic regression models including variables such as canopy height, solar radiation, and distance to roads to evaluate significant characteristics in roost selection.
Ecology and Conservation of Bats I   Student Paper