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Hawaiian hoary bat roost departure-arrival metrics, Hawaii Island 2018-2019

Dates

Publication Date
Start Date
2019-08-05
End Date
2019-10-01

Citation

Montoya-Aiona, K., Calderon, F., Casler, S., Courtot, K., Gorresen, P.M., and Hoeh, J., 2020, Hawaii Island, Hawaiian hoary bat roosting ecology and detection 2018-2019: U.S. Geological Survey data release: https://doi.org/10.5066/P9R95UYT.

Summary

Hawaiian hoary bats (Lasiurus cinereus semotus) were captured at multiple locations on the east side of Hawaii Island from May 2019 to October 2019. Radio transmitters were affixed to captured bats and, when possible, radio telemetry was used to locate bats in trees used for day-roosts. In 2019, three maternity roosts were identified however only two were suitable for video recording. Thermal video recording at two maternal roosts was used to identify the time of bat departure and arrival at a roost. We examined an average of 2 hours during sunset and sunrise (range = 0.9 to 5.4 hours). The time of bat departure from a roost ranged from 53 minutes before sunset to 20 minutes after sunset (n = 48, mean = 2.7 minutes before sunset). [...]

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Hawaiian hoary bat roost departure-arrival data, Hawaii Island 2018-2019.csv 5.79 KB text/csv

Purpose

The Hawaii Endangered Species Recovery Committee has identified research on distribution and trends, habitat suitability, and take monitoring among priority information needed to inform best management actions for the endangered Hawaiian hoary bat (Lasiurus cinereus semotus). We monitored arrival and departure times at day roosts to provide information on the timing of when Hawaiian hoary bats utilize day-roost trees.

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  • Pacific Island Ecosystems Research Center

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