Richard J Camp, PhD
Specialty: Quantitative ecology; abundance and demographic modeling; avian ecology and conservation
Research Interests: Status and trend estimation; Bayesian inference; hierarchical modeling; spatial and temporal modeling; population dynamics modeling
Personal Interests: Running, bicycling, beer brewing and family
Education and Certifications
Ph.D. 2020 Statistics, University of St Andrews, St Andrews, Scotland
M.S. 1995 Wildlife Biology, Colorado State University, Fort Collins, CO
B.S. 1991 Wildlife Management, University of Minnesota, Minneapolis, MN
Science and Products
Filter Total Items: 14
HAVO Montane Ohia Diameter and Cavity Data 2017 HAVO Montane Ohia Diameter and Cavity Data 2017
We quantified the availability of breeding habitat of the endangered Hawaii Akepa (Loxops coccineus). The species is thought to nest excusively in natural cavities within mature ohia (Metrosideros polymorpha) trees but birds commonly occur in short stature trees that presumably do not have any natural cavities because of their polyploidal (many-branched) structure. To test this...
Hawaii Volcanoes National Park Landbird Surveys 2015-2016 Hawaii Volcanoes National Park Landbird Surveys 2015-2016
Hawai`i 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...
Filter Total Items: 104
Pacific island landbird monitoring report, Kalaupapa National Historical Park, 2021 Pacific island landbird monitoring report, Kalaupapa National Historical Park, 2021
In 2021, landbird surveys were conducted at Kalaupapa National Historical Park on the island of Molokaʻi to assess changes in species composition, distribution, and population densities since 2005. Point-transect distance sampling surveys were conducted on six transects at 50 landbird monitoring stations within an 1,834-hectare area. A total of nine landbird species were detected, with...
Authors
Seth Judge, Lauren K. Smith, Richard J. Camp
Fine-grained temporal population monitoring of a declining, critically endangered Hawaiian honeycreeper Fine-grained temporal population monitoring of a declining, critically endangered Hawaiian honeycreeper
Annual point counts are commonly used to monitor birds to track population densities across space and time. Palila (Loxioides bailleui) are surveyed annually in the first quarter, but we recently instituted quarterly sampling that offers a unique opportunity to improve estimator precision. We conducted point-transect distance sampling point counts during the first quarter of 2020 through...
Authors
Richard J. Camp, Chauncey K. Asing, Noah J. Hunt, Alexander Wang, Chris Farmer, Lindsey Neitmann, Paul C. Banko
Using distance sampling with camera traps to estimate densities of ungulates on tropical oceanic islands Using distance sampling with camera traps to estimate densities of ungulates on tropical oceanic islands
Reliable population estimates are one of the most elementary needs for the management of wildlife, particularly for introduced ungulates on oceanic islands. We aimed to produce accurate and precise density estimates of Philippine deer (Rusa marianna) and wild pigs (Sus scrofa) on Guam using motion-triggered cameras combined with distance sampling to estimate densities from observations...
Authors
Richard J. Camp, Trevor M. Bak, Matthew D Burt, Scott Vogt
2022–2024 Status and trends of the Palila (Loxioides bailleui) 2022–2024 Status and trends of the Palila (Loxioides bailleui)
Palila (Loxioides bailleui) are critically endangered Hawaiian honeycreepers specializing on the seedpods of māmane (Sophora chrysophylla) and restricted to Mauna Kea volcano on the Island of Hawaiʻi. A previous analysis of survey data estimated an 89% population decline between 1998 and 2021. Using the most recent annual survey data from 2022, 2023, and 2024, we report updated annual...
Authors
Noah Hunt, Chauncey K. Asing, Lindsey Nietmann, Paul C. Banko, Richard J. Camp
Population trends of native and non-native forest birds on the island of Molokai, Hawaii Population trends of native and non-native forest birds on the island of Molokai, Hawaii
Hawaiʻi’s avifauna has undergone profound changes over the past 1,000 years, with many endemic bird species driven to extinction and non-native introductions reshaping forest ecosystems. On the island of Molokaʻi, habitat degradation and the introduction of mosquito-borne disease, mainly avian malaria (Plasmodium relictum), have caused extinctions and severe declines in native forest...
Authors
Lauren K. Smith, Seth Judge, Ayesha Genz, Lainie Berry, Laura K Berthold, Hanna L. Mounce, Richard J. Camp
Counting the chorus: A bioacoustic indicator of population density Counting the chorus: A bioacoustic indicator of population density
Passive acoustic monitoring has grown in utility for tracking wildlife populations, although challenges remain when using acoustic detections to monitor population size and density. Distance sampling is considered the ‘gold standard’ for estimating animal densities but has several important limitations, especially for rare, cryptic, and high-density species. Here, we test the performance...
Authors
Amanda K Navine, Richard J. Camp, Matthew J Weldy, Tom Denton, Patrick J. Hart
Forest bird population status on Saipan, a small oceanic island Forest bird population status on Saipan, a small oceanic island
Tropical oceanic islands are critical biodiversity hotspots where population monitoring can help to determine the status and trends of rare and endangered species. Saipan is the second largest island in the Mariana Islands and contains many endemic and range-restricted bird species. Surveys of forest birds were conducted on Saipan using point-transect distance sampling, starting in 1982...
Authors
Trevor Bak, Steve Mullin, Emilie Kohler, Bradley A. Eichelberger, Richard J. Camp
Power analysis of water quality of standing water bodies in the Pacific Island Network, 2009–2017 Power analysis of water quality of standing water bodies in the Pacific Island Network, 2009–2017
The National Park Service (NPS) Inventory and Monitoring Division (IMD) aims to provide data on park ecosystems' health to guide management decisions. Since 2007, NPS IMD has monitored water quality in marine areas, streams, anchialine pools, wetlands, and lakes in the Pacific Island Network (PACN) national parks. To maintain long-term monitoring program efficiency, protocols are...
Authors
P. Marcos Gorresen, Richard J. Camp, David F Raikow
The status and conservation needs of the Micronesian Megapode (Megapodius laperouse laperouse) across the Mariana archipelago The status and conservation needs of the Micronesian Megapode (Megapodius laperouse laperouse) across the Mariana archipelago
Context Accurate baseline data for wildlife populations are important to track trends of these populations over time and to identify threats to their long-term persistence. Aims We aimed to assess the status and distribution of the little studied megapode (Megapodius laperouse laperouse) across the Mariana Islands. Methods Using passive and call playback facilitated surveys in 2008...
Authors
Paul Radley, Richard J. Camp, Frederick A Amidon, Ann P. Marshall, P. Marcos Gorresen, Curt T. Kessler
Distribution and trends of endemic Hawaiian waterbirds, 1986–2023 Distribution and trends of endemic Hawaiian waterbirds, 1986–2023
This study updates the status assessment of four endemic endangered Hawaiian waterbird species—ae‘o (Hawaiian stilt, Himantopus mexicanus knudseni), ‘alae ke‘oke‘o (Hawaiian coot, Fulica alai), ‘alae ‘ula (Hawaiian gallinule, Gallinula galeata sandvicensis), and koloa maoli (Hawaiian duck, Anas wyvilliana)—from 1986 to 2016 by incorporating new data from 2017–2023. State-space models...
Authors
P. Marcos Gorresen, Richard J. Camp, Eben H. Paxton
Factors affecting the density of Metabetaeus lohena (Decapoda: Alpheidae) at a high-density anchialine pool environment on the Kona Coast of the Island of Hawai‘i Factors affecting the density of Metabetaeus lohena (Decapoda: Alpheidae) at a high-density anchialine pool environment on the Kona Coast of the Island of Hawai‘i
Caridean shrimps (Caridea) are the dominant macroinvertebrates in most anchialine ecosystems. Hawaiian anchialine ecosystems, primarily composed of shallow surface pools connected to the ocean via hypogeal networks of cracks, tubes, and other voids, support 10 caridean shrimp species, including two federally listed as endangered. Little is known about most of these species. The objective...
Authors
Robert W. Peck, Sarah Nash, Richard J. Camp
Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization
Nihoa and Laysan Island, part of the Northwestern Hawaiian Islands, are host to three endangered passerine species—Nihoa finch (Telespiza ultima), Nihoa millerbird (Acrocephalus familiaris kingi), and Laysan finch (Telespiza cantans). Using point-transect distance sampling survey records from 2010 to 2022 for Nihoa and 2013 to 2019 for Laysan Island, we estimated the density and...
Authors
Trevor Bak, Richard J. Camp, Chris Farmer, Rachel A. Rounds, Sheldon M. Plentovich, John Vetter, Paul C. Banko
Science and Products
Filter Total Items: 14
HAVO Montane Ohia Diameter and Cavity Data 2017 HAVO Montane Ohia Diameter and Cavity Data 2017
We quantified the availability of breeding habitat of the endangered Hawaii Akepa (Loxops coccineus). The species is thought to nest excusively in natural cavities within mature ohia (Metrosideros polymorpha) trees but birds commonly occur in short stature trees that presumably do not have any natural cavities because of their polyploidal (many-branched) structure. To test this...
Hawaii Volcanoes National Park Landbird Surveys 2015-2016 Hawaii Volcanoes National Park Landbird Surveys 2015-2016
Hawai`i 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...
Filter Total Items: 104
Pacific island landbird monitoring report, Kalaupapa National Historical Park, 2021 Pacific island landbird monitoring report, Kalaupapa National Historical Park, 2021
In 2021, landbird surveys were conducted at Kalaupapa National Historical Park on the island of Molokaʻi to assess changes in species composition, distribution, and population densities since 2005. Point-transect distance sampling surveys were conducted on six transects at 50 landbird monitoring stations within an 1,834-hectare area. A total of nine landbird species were detected, with...
Authors
Seth Judge, Lauren K. Smith, Richard J. Camp
Fine-grained temporal population monitoring of a declining, critically endangered Hawaiian honeycreeper Fine-grained temporal population monitoring of a declining, critically endangered Hawaiian honeycreeper
Annual point counts are commonly used to monitor birds to track population densities across space and time. Palila (Loxioides bailleui) are surveyed annually in the first quarter, but we recently instituted quarterly sampling that offers a unique opportunity to improve estimator precision. We conducted point-transect distance sampling point counts during the first quarter of 2020 through...
Authors
Richard J. Camp, Chauncey K. Asing, Noah J. Hunt, Alexander Wang, Chris Farmer, Lindsey Neitmann, Paul C. Banko
Using distance sampling with camera traps to estimate densities of ungulates on tropical oceanic islands Using distance sampling with camera traps to estimate densities of ungulates on tropical oceanic islands
Reliable population estimates are one of the most elementary needs for the management of wildlife, particularly for introduced ungulates on oceanic islands. We aimed to produce accurate and precise density estimates of Philippine deer (Rusa marianna) and wild pigs (Sus scrofa) on Guam using motion-triggered cameras combined with distance sampling to estimate densities from observations...
Authors
Richard J. Camp, Trevor M. Bak, Matthew D Burt, Scott Vogt
2022–2024 Status and trends of the Palila (Loxioides bailleui) 2022–2024 Status and trends of the Palila (Loxioides bailleui)
Palila (Loxioides bailleui) are critically endangered Hawaiian honeycreepers specializing on the seedpods of māmane (Sophora chrysophylla) and restricted to Mauna Kea volcano on the Island of Hawaiʻi. A previous analysis of survey data estimated an 89% population decline between 1998 and 2021. Using the most recent annual survey data from 2022, 2023, and 2024, we report updated annual...
Authors
Noah Hunt, Chauncey K. Asing, Lindsey Nietmann, Paul C. Banko, Richard J. Camp
Population trends of native and non-native forest birds on the island of Molokai, Hawaii Population trends of native and non-native forest birds on the island of Molokai, Hawaii
Hawaiʻi’s avifauna has undergone profound changes over the past 1,000 years, with many endemic bird species driven to extinction and non-native introductions reshaping forest ecosystems. On the island of Molokaʻi, habitat degradation and the introduction of mosquito-borne disease, mainly avian malaria (Plasmodium relictum), have caused extinctions and severe declines in native forest...
Authors
Lauren K. Smith, Seth Judge, Ayesha Genz, Lainie Berry, Laura K Berthold, Hanna L. Mounce, Richard J. Camp
Counting the chorus: A bioacoustic indicator of population density Counting the chorus: A bioacoustic indicator of population density
Passive acoustic monitoring has grown in utility for tracking wildlife populations, although challenges remain when using acoustic detections to monitor population size and density. Distance sampling is considered the ‘gold standard’ for estimating animal densities but has several important limitations, especially for rare, cryptic, and high-density species. Here, we test the performance...
Authors
Amanda K Navine, Richard J. Camp, Matthew J Weldy, Tom Denton, Patrick J. Hart
Forest bird population status on Saipan, a small oceanic island Forest bird population status on Saipan, a small oceanic island
Tropical oceanic islands are critical biodiversity hotspots where population monitoring can help to determine the status and trends of rare and endangered species. Saipan is the second largest island in the Mariana Islands and contains many endemic and range-restricted bird species. Surveys of forest birds were conducted on Saipan using point-transect distance sampling, starting in 1982...
Authors
Trevor Bak, Steve Mullin, Emilie Kohler, Bradley A. Eichelberger, Richard J. Camp
Power analysis of water quality of standing water bodies in the Pacific Island Network, 2009–2017 Power analysis of water quality of standing water bodies in the Pacific Island Network, 2009–2017
The National Park Service (NPS) Inventory and Monitoring Division (IMD) aims to provide data on park ecosystems' health to guide management decisions. Since 2007, NPS IMD has monitored water quality in marine areas, streams, anchialine pools, wetlands, and lakes in the Pacific Island Network (PACN) national parks. To maintain long-term monitoring program efficiency, protocols are...
Authors
P. Marcos Gorresen, Richard J. Camp, David F Raikow
The status and conservation needs of the Micronesian Megapode (Megapodius laperouse laperouse) across the Mariana archipelago The status and conservation needs of the Micronesian Megapode (Megapodius laperouse laperouse) across the Mariana archipelago
Context Accurate baseline data for wildlife populations are important to track trends of these populations over time and to identify threats to their long-term persistence. Aims We aimed to assess the status and distribution of the little studied megapode (Megapodius laperouse laperouse) across the Mariana Islands. Methods Using passive and call playback facilitated surveys in 2008...
Authors
Paul Radley, Richard J. Camp, Frederick A Amidon, Ann P. Marshall, P. Marcos Gorresen, Curt T. Kessler
Distribution and trends of endemic Hawaiian waterbirds, 1986–2023 Distribution and trends of endemic Hawaiian waterbirds, 1986–2023
This study updates the status assessment of four endemic endangered Hawaiian waterbird species—ae‘o (Hawaiian stilt, Himantopus mexicanus knudseni), ‘alae ke‘oke‘o (Hawaiian coot, Fulica alai), ‘alae ‘ula (Hawaiian gallinule, Gallinula galeata sandvicensis), and koloa maoli (Hawaiian duck, Anas wyvilliana)—from 1986 to 2016 by incorporating new data from 2017–2023. State-space models...
Authors
P. Marcos Gorresen, Richard J. Camp, Eben H. Paxton
Factors affecting the density of Metabetaeus lohena (Decapoda: Alpheidae) at a high-density anchialine pool environment on the Kona Coast of the Island of Hawai‘i Factors affecting the density of Metabetaeus lohena (Decapoda: Alpheidae) at a high-density anchialine pool environment on the Kona Coast of the Island of Hawai‘i
Caridean shrimps (Caridea) are the dominant macroinvertebrates in most anchialine ecosystems. Hawaiian anchialine ecosystems, primarily composed of shallow surface pools connected to the ocean via hypogeal networks of cracks, tubes, and other voids, support 10 caridean shrimp species, including two federally listed as endangered. Little is known about most of these species. The objective...
Authors
Robert W. Peck, Sarah Nash, Richard J. Camp
Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization
Nihoa and Laysan Island, part of the Northwestern Hawaiian Islands, are host to three endangered passerine species—Nihoa finch (Telespiza ultima), Nihoa millerbird (Acrocephalus familiaris kingi), and Laysan finch (Telespiza cantans). Using point-transect distance sampling survey records from 2010 to 2022 for Nihoa and 2013 to 2019 for Laysan Island, we estimated the density and...
Authors
Trevor Bak, Richard J. Camp, Chris Farmer, Rachel A. Rounds, Sheldon M. Plentovich, John Vetter, Paul C. Banko