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2018 Kaua'i forest bird population estimates and trends

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Title:2018 Kaua'i forest bird population estimates and trends
Authors:Paxton, Eben H.
Brinck, Kevin W.
Crampton, Lisa H.
Hite, Justin
Costantini, Maria
Keywords:forest birds
native species
population estimates
Date Issued:11 Nov 2020
Series:HCSU Technical Report Series;98
Abstract: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.
Description:Technical report with figures and tables.
Pages/Duration:31 pages
Rights:Attribution-NonCommercial-NoDerivs 3.0 United States
Appears in Collections: Hawaii Cooperative Studies Unit (HCSU)

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