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The site was identified as internationally important for bird conservation in 2014 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Black-billed Gull Larus bulleri	NT	breeding (1967–2010)	58–68 breeding pairs	A1
Black-fronted Tern Chlidonias albostriatus	EN	breeding (1967–2010)	19–25 breeding pairs	A1

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 key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Invasive and other problematic species and genes	happen­ing now	some of popul­ation/area (10–49%)	moderate deteri­oration (10–30% in 3 gener­ations)	high
Human intrusions and disturbance	happen­ing now	some of popul­ation/area (10–49%)	slow deteri­oration (1–10% over 3 gener­ations)	medium
Natural system modifications	happen­ing now	some of popul­ation/area (10–49%)	slow deteri­oration (1–10% over 3 gener­ations)	medium
Climate change and severe weather	likely in short term (within 4 years)	some of popul­ation/area (10–49%)	moderate deteri­oration (10–30% in 3 gener­ations)	medium

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Not assessed	Not assessed	Not assessed	not assessed

Habitat	% of IBA	Habitat detail
Introduced vegetation	major (>10)
Shrubland	major (>10)
Wetlands (inland)	major (>10)

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Manuherikia (New Zealand). Downloaded from https://datazone.birdlife.org/site/factsheet/manuherikia-iba-new-zealand on 14/01/2025.