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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 IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Black-faced Cormorant Phalacrocorax fuscescens	LC	resident (2001–2007)	320–400 breeding pairs	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 (2019) is shown below.

Pressure (threats to the key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Transportation and service corridors	happen­ing now	most of popul­ation/area (50–90%)	no deteri­oration (<1% over 3 gener­ations)	low
Human intrusions and disturbance	happen­ing now	most of popul­ation/area (50–90%)	no deteri­oration (<1% over 3 gener­ations)	low
Biological resource use	happen­ing now	some of popul­ation/area (10–49%)	no deteri­oration (<1% over 3 gener­ations)	low

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Whole area of site (>90%) covered by appropriate conservation designation	Unknown	Unknown	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1999	Three Sisters-Goat Island	Nature Reserve (IV)	100

Habitat	% of IBA	Habitat detail
Marine Coastal/Supratidal	100

Land use	% of IBA
nature conservation and research	100

Owned by the Tasmanian State Government and managed by the Parks and Wildlife Service.

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Three Sisters (Bass Strait) (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/three-sisters-(bass-strait)-iba-australia on 23/01/2025.