Data

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...

This data release includes 12 data files documenting climatic, hydrologic, and mosquito variables collected at seven riparian study sites on three streams located on the windward flank of Mauna Kea on the Island of Hawai'i from 2022 to 2024. Daily ambient temperature, ambient relative humidity, cumulative precipitation, stream pool water temperatures, and stream height (stage) were...

This data publication contains data files collected as part of a field and laboratory effort aimed at estimating the prevalence and altitudinal distribution of avian malaria in forest birds and in the primary vector of malaria in Hawaii, Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, on the island of Maui in 2002 and 2019. To track the spread of mosquitoes and...

A leading contributor to the decline of Hawaiian forest birds is avian malaria caused by the protozoan parasite Plasmodium relictum and that is transmitted by the Southern House Mosquito (Culex quinquefasciatus). For conservation purposes, landscape-scale mosquito control techniques are being considered to disrupt the malaria disease cycle in key Hawaiian forest bird habitats. The...

This data release comprises a collection of high-resolution environmental raster data for the Hawaiian Islands, developed to support conservation planning and ecological research. The collection includes both 30-meter and 10-meter resolution GeoTIFFs with topographical variables (elevation, aspect, slope, hillshade, and geomorphon landform classification), as well as complementary...

Toxic baiting is a primary method used to suppress many invasive species, including the brown treesnake (Boiga irregularis) in Guam. Based on limited alternative approaches to assess tool efficacy in snake removal, bait take is often used as a proxy for snake removal, despite evidence that non-targets remove baits in a spatially heterogeneous manner. Using photographic validation, we...

The yǻyaguak (Mariana swiftlet; Aerodramus bartschi) is an endangered cave-nesting species historically found on Guam and the southern Mariana Islands, Micronesia. The population on Guam has been severely impacted by the introduction of the brown treesnake (Boiga irregularis). We analyzed nest attendance behavior derived from near-infrared videography at the colonies at Mahlac and...

Ambrosia beetles (Coleoptera: Curculionidae) have been implicated in the spread of Ceratocystis fungi that cause rapid ‘ōhiʻa death (ROD), a deadly fungal disease threatening the keystone Hawaiian tree ʻōhiʻa lehua (Metrosideros polymorpha). Research has investigated the role that ambrosia beetles play in the spread of the disease, including studies within Hawaiʻi Volcanoes National Park...

During 2018, USGS staff collected debris from the floors of 30 shipping containers located in Honolulu on the island of Oʻahu and destined for Wake Atoll as part of a study to understand biosecurity risks associated with overseas transport. The debris was sown in grow trays and monitored for plant germination for seven months in 2020-2021. The datasets for this project include: a list of...

We examined acoustic activity of the endangered Hawaiian hoary bat ('ōpe'ape'a; Lasiurus semotus), as well as surveyed potential roost trees at Pearl Harbor National Memorial (PERL) located on Ford Island, O‘ahu, Hawaii. The study area was located at the Ford Island Chief Petty Officer's (CPO) Bungalows Neighborhood, which covers approximately 4 acres and includes five historic CPO...

These data were created in October 2023 while completing nocturnal visual surveys for brown treesnakes (Boiga irregularis) as part of an early detection and rapid response training exercise. They contain data on counts of lizards, small mammals, and birds documented while completing surveys. There are no brown treesnake counts because no snakes were detected during the exercise.

Ceratocystis lukuohia is one of two fungal pathogens that causes Rapid ‘Ōhi‘a Death (ROD) in Hawaii. This data release includes metadata and tabular data that documents the persistence of C. lukuohia in ‘ōhi‘a trees (Metrosideros polymorpha) that have died from the disease. Additionally, the data release documents the presence of active ambrosia beetle (Curculionidae, Xyleborini)...