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Island of Hawaiʻi, 'ōpe‘ape‘a day-roost visual checks, 2019-2022

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 03:07 AM | Dataset Last Updated: March 10, 2026 at 12:00 AM
The 'ōpe‘ape‘a, also known as the Hawaiian hoary bat (Lasiurus semotus; Chiroptera: Vespertilionidae), is a solitary, insectivorous, and foliage-roosting endemic species. We investigated day-roost lability and fidelity, nocturnal activity patterns at the roost, and long-term use of roosts by 'ōpe‘ape‘a. The full data release consists of six tabular datasets: (1) Island of Hawai‘i, 'ōpe‘ape‘a day-roost detection records, 2018-2021, (2) Island of Hawai‘i, 'ōpe‘ape‘a day-roost switch metrics, 2018-2021, (3) Island of Hawai‘i, 'ōpe‘ape‘a day-roost activity metrics, 2018-2021, (4) Island of Hawai‘i, 'ōpe‘ape‘a day-roost long-term fidelity, 2019-2022, (5) Island of Hawai‘i, 'ōpe‘ape‘a day-roost visual checks, 2019-2022, and (6) Island of Hawai‘i, 'ōpe‘ape‘a day-roost change-points, 2019-2021. Here the fifth dataset is described, "Island of Hawai‘i, 'ōpe‘ape‘a day-roost visual checks, 2019-2022". The dataset consists of visual observations at identified bat day-roost trees. Roost visits confirming the presence of roosting bats consisted of visual checks with binoculars, spotting scopes, thermal imagers, and the unaided eye. Data collected includes start and end times of monitoring, methods used, and individual bat identities when known.

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