Investigator Islands


IBA Justification

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
Cape Barren Goose Cereopsis novaehollandiae LC resident (1979–2006) 500–951 birds A4i
Black-faced Cormorant Phalacrocorax fuscescens LC resident (2001) common A4i
Pacific Gull Larus pacificus LC resident (1976–2004) 35 pairs A4i
Fairy Tern Sternula nereis VU resident (1974–1997) 30 pairs A1, A4i

IBA Conservation

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2009. The most recent assessment (2008) is shown below.

IBA conservation assessment
Year of assessment State Pressure Response
2008 not assessed low not assessed
Whole site assessed? State assessed by Accuracy of information
yes unset medium

Pressure (threats to the trigger species and/or their habitats)
Threat Timing Scope Severity Result
Invasive and other problematic species and genes happe­ning now most of popul­ation/area (50–90%) no or slight decline (<1% over 3 gener­ations) low
Human intrusions and disturbance happe­ning now some of popul­ation/area (10–49%) 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

IBA Protection

Year Protected Area Designation (management category) % coverage of IBA
1967 Investigator Group Wilderness Protection Area (Ib) 4
1991 Waldegrave Islands Conservation Park (Ia) 7
1995 Unnamed (No.HA1003) Heritage Agreement (III) 6
2009 Investigator Marine Park (II) 7
2009 Investigator Marine Park (II) 3
2011 Investigator Group Wilderness Protection Area (Ia) 7

Habitats

Habitat % of IBA Habitat detail
Artificial/Terrestrial major (>10) Improved grassland & pasture
Shrubland major (>10) Heath; Other shrublands

Land use

Land use % of IBA
nature conservation and research major (>10)
rangeland/pastureland major (>10)

Land ownership
Flinders Island is leasehold. Other islands are owned and managed by the South Australian government.


Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Investigator Islands (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/investigator-islands-iba-australia on 23/12/2024.