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The site was identified as important in 2014 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
New Zealand Grebe Poliocephalus rufopectus	LC	resident	1926-2015	29-281 individuals	A1
Australasian Bittern Botaurus poiciloptilus	VU	resident	1975-2015	9-16 individuals	A1
Black-billed Gull Larus bulleri	NT	breeding	1941-2015	150-1,983 individuals	A1
Black-fronted Tern Chlidonias albostriatus	EN	non-breeding	1947-2015	54-400 individuals	A1, A4i

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2014) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2014. The most recent assessment (2014) 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	some of area/population (10-49%)	moderate to rapid deterioration	high
Natural system modifications	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Pollution	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation	% overlap with IBA
1987	Lake Wairarapa Wetland	Stewardship Area	64
1987	Riversdale Road	Stewardship Area	<1
1987	Masterton	Stewardship Area	<1
1987	Diversion	Stewardship Area	<1
1987	Matthews & Boggy Pond Wildlife	Government Purpose Reserve	-
2003	Waiorongomai	Conservation Covenant	<1
2011	Unnamed - Featherston	Nature Reserve	-

Habitat1	Habitat detail	% of IBA
Introduced vegetation		major (>10)
Wetlands (inland)	Freshwater lakes & pools, Permanent herbaceous swamps & bogs, Rivers & streams	major (>10)
Marine Coastal/Supratidal		minor (<10)
Marine Intertidal		minor (<10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Wairarapa Moana Ruamahanga (New Zealand). Downloaded from https://datazone.birdlife.org/site/factsheet/wairarapa-moana-ruamahanga-iba-new-zealand on 26/11/2024.