Whenua Hou Codfish Island (New Zealand)

NZ117

Whenua Hou Codfish Island

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
Fiordland Penguin Eudyptes pachyrhynchus	NT	breeding	1934-1995	125-259 breeding pairs	A1, A4ii
Yellow-eyed Penguin Megadyptes antipodes	EN	breeding	1940-2014	44-100 nests	A1, A4ii
Cook's Petrel Pterodroma cookii	VU	breeding	1934-2007	2,601-20,000 breeding pairs	A1, A4ii
Mottled Petrel Pterodroma inexpectata	NT	breeding	1934-2006	203,333-499,999 breeding pairs	A1, A4ii
Sooty Shearwater Ardenna grisea	NT	breeding	2001-2006	min 173,000 breeding pairs	A4ii
Stewart Island Shag Leucocarbo chalconotus	VU	breeding	2011	44-51 breeding pairs	A1, A4i
Kakapo Strigops habroptilus	CR	resident	2007	max 50 mature individuals	A1
New Zealand Kaka Nestor meridionalis	VU	resident	-	present	A1
Yellowhead Mohoua ochrocephala	NT	resident	-	present	A1
A4iii Species group - seabirds	n/a	breeding	1999	100,000-499,999	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	high	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	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Human intrusions and disturbance	likely in short term (within 4 years)	small area/few individuals (<10%)	slow but significant 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
1986	Whenua Hou	Nature Reserve	100

Habitats

Habitat¹	Habitat detail	% of IBA
Forest		major (>10)
Grassland		major (>10)
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)
Shrubland		major (>10)
Wetlands (inland)		minor (<10)

1. IUCN Habitat classification.

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Whenua Hou Codfish Island (New Zealand). Downloaded from https://datazone.birdlife.org/site/factsheet/whenua-hou-codfish-island-iba-new-zealand on 22/11/2024.