In 2021, on the island of Molokai, reserves managed by The Nature Conservancy and the Hawaii Department of Land and Natural Resources; as well as Kalaupapa National Park were surveyed for landbirds and landbird habitat in order to provide information for monitoring long-term trends in forest bird distribution, density, and abundance. Based on the point-transect distance sampling history on Molakai, a 3,527-ha core area was defined to assess long-term population trends since 1979, when the first surveys were conducted. Areas of Kalaupapa National Park were excluded from the core area because of an intermittent survey schedule. However, this dataset provides all of the 2021 survey data including areas inside and outside the core area, which is denoted by “Core_Area”. A summary of the 2021 survey results for the core area and for Kalauapapa National Park will be provided in separate products, such as an NPS National Resource Report and a relevant scientific journal. The 2021 survey effort is expected to be repeated in collaboration with PACN, The Nature Conservancy, the Maui Forest Bird Recovery Project, and the Hawaii Department of Land and Natural Resources every 5-6 years.

Four parks in the Pacific Island Network were surveyed to monitor long-term trends in landbird composition, distribution, density, and abundance. Hawaiʻi Volcanoes National Park (HAVO) was surveyed in 2010, 2015-2016, 2019-2021, and 2024; the National Park of American Samoa (NPSA) in 2011, 2018, and 2023; and Haleakalā National Park (HALE) in 2012, 2017, and 2022. Surveys began in 2021 at Kalaupapa National Historical Park (KALA) and neighboring lands managed by the Hawaiʻi Department of Land and Natural Resources and The Nature Conservancy. Surveys in HAVO also included some adjacent state and private conservation lands and thus results provide broad spatial coverage of species detected. Using point-transect distance sampling, the surveys provide indices of relative abundance and occurrence. The dominant canopy species composition, canopy height and cover, and dominant understory species composition are also recorded at each survey station. Estimates of landbird population density and abundance are assessed in a trend analysis and published in the NPS Science Report Series or scientific journal. Alongside permanent survey transects from past surveys, randomly generated point-transects were included, creating a split-panel sampling design. This dataset includes the results from these landbird and habitat surveys.

Four parks in the Pacific Island Network were surveyed to monitor long-term trends in landbird composition, distribution, density, and abundance. Hawaiʻi Volcanoes National Park (HAVO) was surveyed in 2010, 2015-2016, 2019-2021, and 2024; the National Park of American Samoa (NPSA) in 2011, 2018, and 2023; and Haleakalā National Park (HALE) in 2012, 2017, and 2022. Surveys began in 2021 at Kalaupapa National Historical Park (KALA) and neighboring lands managed by the Hawaiʻi Department of Land and Natural Resources and The Nature Conservancy. Surveys in HAVO also included some adjacent state and private conservation lands and thus results provide broad spatial coverage of species detected. Using point-transect distance sampling, the surveys provide indices of relative abundance and occurrence. The dominant canopy species composition, canopy height and cover, and dominant understory species composition are also recorded at each survey station. Estimates of landbird population density and abundance are assessed in a trend analysis and published in the NPS Science Report Series or scientific journal. Alongside permanent survey transects from past surveys, randomly generated point-transects were included, creating a split-panel sampling design. This dataset includes the results from these landbird and habitat surveys.

Four Pacific Island Network parks were surveyed for landbirds and landbird habitat in order to provide information for monitoring long-term trends in forest bird distribution, density, and abundance. Hawaii Volcanoes National Park (HAVO) was surveyed in 2010, 2015/2016 and 2019/2020. Surveys were conducted in the National Park of American Samoa (NPSA) in 2011 and 2018, in Haleakala National Park (HALE) in 2012, 2017, and 2022, and in 2021, surveys began at Kalaupapa National Historical Park (KALA). The entire survey areas were surveyed using point-transect distance sampling to calculate estimates of bird abundance and densities. Canopy cover and composition was collected at the same survey area. In addition to the permanent survey transects from past landbird surveys in the survey areas, randomly generated point-transects were also surveyed, providing a split panel sampling design. This dataset contains the results of the landbird point count and habitat surveys for HAVO, NPSA, HALE, and KALA.

Hawaiʻi Volcanoes National Park (HAVO) was surveyed for landbirds and landbird habitat from February through April 2015 and February through April 2016. This information provides the second datum in the time-series of Pacific Island Network (PACN) monitoring for long-term trends in landbird distribution, density, and abundance. Initial PACN surveys were conducted in 2010 and are repeated every five years. The entire survey area was comprised of eight tracts in forest, woodland, and shrub habitat, totaling 26,364 ha. Each tract was surveyed using point-transect distance sampling to calculate estimates of bird abundance and density. . In addition to the permanent PACN survey transects, randomly generated point-transects were also surveyed, allowing for a split panel sampling design.

Hawaiʻi Volcanoes National Park (HAVO) was surveyed for landbirds and landbird habitat from February through April 2015 and February through April 2016. This information provides the second datum in the time-series of Pacific Island Network (PACN) monitoring for long-term trends in landbird distribution, density, and abundance. Initial PACN surveys were conducted in 2010 and are repeated every five years. The entire survey area was comprised of eight tracts in forest, woodland, and shrub habitat, totaling 26,364 ha. Each tract was surveyed using point-transect distance sampling to calculate estimates of bird abundance and density. . In addition to the permanent PACN survey transects, randomly generated point-transects were also surveyed, allowing for a split panel sampling design.

Shoreline bird surveys were conducted in Kalaupapa National Historical Park to inventory avian species diversity and relative abundance. Seasonal migrants (waterfowl, shorebirds) were the primary focus of the routine surveys, but seabirds, raptorial species, and native waterbirds were also recorded as encountered. The coastline of Kalaupapa National Historical Park was surveyed once over a two day period, 5-6 April 2005. The park coast consists of sandy and rocky beaches, steep rock cliffs adjoining grassy pastures, and uninhabited offshore islets. Pacific golden plovers, wandering tattlers, and ruddy turnstones are common seasonal migrants that were observed along the survey route. Four seabird species common to the Hawaiian Islands, great frigatebird, wedge-tailed shearwater, re-tailed tropicbird, and white-tailed tropicbird were observed as well. An unknown booby species, most likely red-footed booby was seen on the offshore islets. All passerine species observed along the shoreline route were non-native. No waterfowl or raptors were observed during the survey. Also included are GIS shapefiles of the shoreline bird inventory route taken, and all species detected during the inventory.

This data release contains the point-transect distance sampling records of forest bird survey collected in the Kohala Mountain complex in 2017, including survey point IDs, distance to detected birds, sampling conditions, ohia phenology, habitat classifications and background noise levels. This data release consists of one tabular dataset.

This data release contains the point-transect distance sampling records of forest bird survey collected in the Kohala Mountain complex in 2017, including survey point IDs, distance to detected birds, sampling conditions, ohia phenology, habitat classifications and background noise levels. This data release consists of one tabular dataset.

The data are in a tab delimited file titled HAVO_2015_2016_HabitatData.txt. Hawaiʻi Volcanoes National Park (HAVO) was surveyed for landbirds and landbird habitat from February through April 2015 and February through April 2016. This information provides the second datum in the time-series of Pacific Island Network (PACN) monitoring for long-term trends in landbird distribution, density, and abundance. Initial PACN surveys were conducted in 2010 and are repeated every five years. The entire survey area was comprised of eight tracts in forest, woodland, and shrub habitat, totaling 26,364 ha. Each tract was surveyed using point-transect distance sampling to calculate estimates of bird abundance and density. In addition to the permanent PACN survey transects, randomly generated point-transects were also surveyed, allowing for a split panel sampling design.