2022–2024 Status and trends of the palila (Loxioides bailleui)

Simple item page
dc.coverage.spatialIsland of Hawai'i, Hawaiian Islands
dc.coverage.temporal2022–2024
dc.creatorNoah Hunt
dc.creatorChauncey K. Asing
dc.creatorLindsey Nietmann
dc.creatorPaul C. Banko
dc.creatorRichard J. Camp
dc.date.accessioned2025-05-07T17:00:37Z
dc.date.available2025-05-07T17:00:37Z
dc.date.issued2025-05-07
dc.description.abstractPalila (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 population estimates and trends since 1998. The 2022 population estimate was 367–742 birds (point estimate: 545); the 2023 population estimate was 374–842 birds (point estimate: 596); and the 2024 population estimate was 412–970 birds (point estimate: 666). Our estimates for survey years prior to 2022 were within the confidence intervals of the estimates from the previous analysis. Our models likewise showed a population fluctuating between 4,000 and 6,800 birds from 1998 to 2005 (except for an unusually low estimate in 2000), and then a steep decline through 2010. For the next decade, palila abundance fluctuated between 776 and 1,346 birds, before declining again in 2021 to 679 birds. From 1998 to 2024, the population declined by >90% or 203 birds/year, with very strong statistical evidence of an overall downward trend.
dc.formatTechnical Report
dc.format.extent22 pages
dc.identifier.citationHunt, N. J., C. K. Asing, L. Nietmann, P. C. Banko, and R. J. Camp. 2025. 2022–2024 Status and trend of the palila (Loxioides bailleui). Hawai‘i Cooperative Studies Unit Technical Report HCSU-115. University of Hawai‘i at Hilo. 22 pages. https://hdl.handle.net/10790/5398
dc.identifier.urihttps://hdl.handle.net/10790/5398
dc.languageeng
dc.publisherUniversity of Hawai'i at Hilo
dc.rightshttp://rightsstatements.org/vocab/NoC-NC/1.0/
dc.subjectabundance estimates
dc.subjectendangered species
dc.subjectIsland of Hawai'i
dc.subjectLoxioides bailleui
dc.subjectpalila
dc.subjectpopulation decline
dc.title2022–2024 Status and trends of the palila (Loxioides bailleui)
dcterms.rightsWork cannot be altered. Creative commons.
dcterms.typeText
prism.endingpage19
prism.number115
prism.publicationnameHawai'i Cooperative Studies Unit Technical Report Series
prism.startingpagei

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
TR115 Hunt_2025_2022-2024 Status and Trend of the Palila Loxioides bailleui.pdf
Size:
1.68 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.73 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Hawaii Cooperative Studies Unit (HCSU)