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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
Wrybill Anarhynchus frontalis	VU	breeding	2006-2010	67-254 breeding pairs	A1, A4i
Black-billed Gull Larus bulleri	NT	breeding	1970-2014	985-3,012 breeding pairs	A1, A4i
Black-fronted Tern Chlidonias albostriatus	EN	breeding	1982-2010	218-524 breeding pairs	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
Climate change and severe weather	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Human intrusions and disturbance	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	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

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	Rangitata Riverbed Clarke Flat	Stewardship Area	<1
1987	Rangitata Riverbed Rangitata Huts	Stewardship Area	<1
1987	Rangitata Riverbed Peel View	Stewardship Area	<1
1987	Rangitata Riverbed Cain Flat	Stewardship Area	<1
1987	Rangitata Gorge	Stewardship Area	<1
1987	Upper Rangitata Riverbed	Stewardship Area	1
1988	Arundel	Stewardship Area	<1
1999	Rangitata Riverbed Ealing	Government Reserve	1
2007	Tenehaun	Scenic Reserve	<1
2008	Mt Potts	Stewardship Area	5
2008	Mount Sunday	Conservation Covenant	1

Habitat1	Habitat detail	% of IBA
Grassland		major (>10)
Introduced vegetation		major (>10)
Shrubland		major (>10)
Wetlands (inland)		major (>10)
Marine Intertidal		minor (<10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Rangitata River (New Zealand). Downloaded from https://datazone.birdlife.org/site/factsheet/rangitata-river-iba-new-zealand on 22/11/2024.