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

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 ('triggering') IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
White-faced Storm-petrel Pelagodroma marina	LC	breeding (1934–2000)	7,500–10,000 pairs	A4ii
Grey-faced Petrel Pterodroma gouldi	LC	breeding (1972–2013)	58,143–499,999 pairs	A4ii
Fluttering Shearwater Puffinus gavia	LC	breeding (1930–1995)	1,000–4,999 pairs	A4ii
Little Shearwater Puffinus assimilis	LC	breeding (1995–2000)	3,150–10,097 pairs	A4ii
A4iii Species group - seabirds	n/a	- (-)	500,000-999,999 pairs	A4iii

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	likely in long term (>4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Biological resource use	happe­ning now	some of popul­ation/area (10–49%)	no or slight decline (<1% over 3 gener­ations)	low
Pollution	happe­ning now	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low

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

Year	Protected Area	Designation (management category)	% coverage of IBA
1965	Aldermen Islands (Ruamaahu)	Wildlife Sanctuary (IV)	94
1971	Aldermen Islands (Ruamaahu)	Nature Reserve (Ia)	100

Habitat	% of IBA	Habitat detail
Forest	major (>10)
Marine Coastal/Supratidal	major (>10)
Marine Intertidal	major (>10)
Shrubland	major (>10)

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Ruamaahua Aldermen Islands (New Zealand). Downloaded from https://datazone.birdlife.org/site/factsheet/ruamaahua-aldermen-islands-iba-new-zealand on 26/12/2024.