Ruamaahua Aldermen Islands (New Zealand)

NZ025

Ruamaahua Aldermen Islands

Current view: Data table and detailed info

IBA Justification

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
White-faced Storm-petrel Pelagodroma marina	LC	breeding	1934-2000	7,500-10,000 breeding pairs	A4ii
Grey-faced Petrel Pterodroma gouldi	LC	breeding	1972-2013	58,143-499,999 breeding pairs	A4ii
Fluttering Shearwater Puffinus gavia	LC	breeding	1930-1995	1,000-4,999 breeding pairs	A4ii
Little Shearwater Puffinus assimilis	LC	breeding	1995-2000	3,150-10,097 breeding pairs	A4ii
A4iii Species group - seabirds	n/a	-	-	500,000-999,999 breeding pairs	A4iii

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

IBA Conservation

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.

IBA conservation assessment
Year of assessment	State	Pressure	Response
2014	not assessed	medium	not assessed
Whole site assessed?	State assessed by	Accuracy of information
no	unset	-

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 (beyond 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Biological resource use	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Pollution	happening now	small area/few individuals (<10%)	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

IBA Protection

Year	Protected Area	Designation	% overlap with IBA
1965	Aldermen Islands (Ruamaahu)	Wildlife Sanctuary	94
1971	Aldermen Islands (Ruamaahu)	Nature Reserve	100

Habitats

Habitat¹	Habitat detail	% of IBA
Forest		major (>10)
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)
Shrubland		major (>10)

1. IUCN Habitat classification.

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 23/11/2024.