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The site was identified as internationally important for bird conservation in 2009 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
Banded Stilt Cladorhynchus leucocephalus	LC	non-breeding (1998–2007)	43–20,000 birds	A4i
Fairy Tern Sternula nereis	VU	resident (1950–2008)	200 pairs	A1, A4i

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2009. The most recent assessment (2020) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Marine Coastal/Supratidal	good (>90%)	good (>90%)	good

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Residential and commercial development	past (and unlikely to return) and no longer limiting	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	A compre­hensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented, but these are not compre­hensive and are limited by resources and capacity	high

Habitat	% of IBA	Habitat detail
Forest	major (>10)	Melaleuca forests & woodlands
Shrubland	major (>10)	Acacia shrublands; Heath
Marine Coastal/Supratidal	minor (<10)

Land use	% of IBA
tourism/recreation	major (>10)
urban/industrial/transport	major (>10)

Western Australian State Government with management the responsibility of the Rottnest Island Authority.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Rottnest Island (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/rottnest-island-iba-australia on 23/12/2024.