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Island of Hawaiʻi, 'ōpe‘ape‘a day-roost long-term fidelity, 2019-2022

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:34 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 fourth dataset is described, "Island of Hawai‘i, 'ōpe‘ape‘a day-roost long-term fidelity, 2019-2022". The dataset consists of visual observations at a subset of identified bat day-roost trees that were monitored, when possible, over time, with an emphasis on previously used maternity roosts. From the broader study of day-roost use, only the subset of trees at which a bat(s) was visually confirmed and then later revisited are included in this dataset. Data were collected from June 2019 to June 2022 and included observations at seven day-roost trees that had been identified during prior studies 2005-2008. Data collected included roost tree metrics such as tree species, height, diameter at breast height (DBH), canopy cover classification, the number of times visual checks at roosts were conducted, start and end dates of monitoring, and individual bat demographics when known.

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