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2018 Kaua'i forest bird population estimates and trends

November 11, 2020
Kaua‘i's native forest birds have experienced steep declines since the beginning of systematic surveys in 1981, and declines have accelerated in recent decades. This report details the analysis of the most recent surveys conducted in 2018. Incorporating the new survey results, long-term trends continue to show sharp declines for all native honeycreeper species with the exception of ‘apapane (Himatione sanguinea), which has stable numbers in core areas of its range. Kaua‘i ‘elepaio (Chasiempis sclateri) continued to decline in the outer portions of its range but increased in the core areas of its range. Abundance estimates of forest birds ranged from slightly higher to slightly lower in most species, indicating a relatively stable period from 2012–2018, and a pause from the rapid declines seen in earlier periods. Many native species now exist in very low numbers, and variation in estimates from survey to survey will increase.
Publication Year 2020
Title 2018 Kaua'i forest bird population estimates and trends
Authors Eben H. Paxton, Kevin W. Brinck, Lisa H. Crampton, Justin Hite, Maria Costantini
Publication Type Report
Publication Subtype Other Government Series
Index ID 70216419
Record Source USGS Publications Warehouse
USGS Organization Pacific Island Ecosystems Research Center