• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2006 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Henderson Island Fruit-dove Ptilinopus insularis	VU	resident	1987-1992	3,140-3,420 individuals	A1, A2
Henderson Island Crake Zapornia atra	VU	resident	1987-1992	3,240-6,200 individuals	A1, A2
Kermadec Petrel Pterodroma neglecta	LC	breeding	1991	10,000 breeding pairs	A4ii
Herald Petrel Pterodroma heraldica	LC	breeding	1991	11,100 breeding pairs	A4ii
Henderson Petrel Pterodroma atrata	EN	breeding	1991-1992	16,000 breeding pairs	A1, A4ii
Bristle-thighed Curlew Numenius tahitiensis	NT	winter	1991-1992	max 50 individuals	A1
Gygis alba	NR	breeding	1991	max 10,000 breeding pairs	A4i
Henderson Lorikeet Vini stepheni	VU	resident	1987	720-1,820 individuals	A1, A2
Henderson Island Reed-warbler Acrocephalus taiti	VU	resident	1991-1992	min 250 adults	A1, A2
A4iii Species group - seabirds	n/a	breeding	1991	37,100 breeding pairs	A4iii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2006) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2006. The most recent assessment (2013) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Invasive and other problematic species and genes	happening now	whole area/population (>90%)	slow but significant deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

Year	Protected Area	Designation	% overlap with IBA
1988	Henderson Island	World Heritage Site (natural or mixed)	78
2016	Pitcairn Islands Marine Reserve	Marine Reserve	3

Habitat1	Habitat detail	% of IBA
Marine Neritic		major (>10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Henderson Island (Pitcairn Islands (to UK)). Downloaded from https://datazone.birdlife.org/site/factsheet/henderson-island-iba-pitcairn-islands-(to-uk) on 22/11/2024.