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• Text account
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• Reference and further resources

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 (1989–2007)	473 pairs	A4i
Little Penguin Eudyptula minor	LC	resident (1978–1997)	41,000 pairs	A4ii
White-faced Storm-petrel Pelagodroma marina	LC	resident (1978–1997)	44,000 pairs	A4ii
Short-tailed Shearwater Ardenna tenuirostris	LC	resident (1975–1995)	790,000 pairs	A4ii
Black-faced Cormorant Phalacrocorax fuscescens	LC	resident (1978–1997)	336–436 birds	A4i
Sooty Oystercatcher Haematopus fuliginosus	LC	resident (1978–1997)	102 pairs	A4i
Pacific Gull Larus pacificus	LC	resident (1978–1997)	229 pairs	A4i
Fairy Tern Sternula nereis	VU	resident (1986)	89 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 (2008) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Invasive and other problematic species and genes	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Biological resource use	happe­ning now	some of popul­ation/area (10–49%)	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

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Little Goose Island Nature Reserve	Nature Reserve (-)	<1
-	Little Badger Island Nature Reserve	Nature Reserve (-)	<1
-	Beagle Island Nature Reserve	Nature Reserve (-)	<1
1999	East Kangaroo Island	Nature Reserve (IV)	10
1999	Big Green Island	Nature Reserve (IV)	13
1999	Chappell Islands	Nature Reserve (IV)	1
1999	Isabella Island	Nature Reserve (Ia)	1
1999	Goose Island	Conservation Area (VI)	5
2000	Badger Island	Indigenous Protected Area (V)	59
2000	Mt Chappell Island	Indigenous Protected Area (V)	15
2000	Chalky Island	Conservation Area (VI)	2
2000	Wybalenna Island	Conservation Area (VI)	1
2000	Mile Island	Conservation Area (VI)	<1
2011	Pasco Group	Conservation Area (V)	2
2011	Marriott Reef	Conservation Area (V)	<1
2013	Little Chalky Island	Conservation Area (VI)	<1

Habitat	% of IBA	Habitat detail
Artificial/Terrestrial	major (>10)	Improved grassland & pasture
Grassland	major (>10)	Tussock grasslands
Shrubland	minor (<10)	Chenopod shrubs, samphire shrubs and forblands
Marine Coastal/Supratidal	-

Land use	% of IBA
nature conservation and research	major (>10)
rangeland/pastureland	major (>10)
not utilised	minor (<10)

Tasmanian State Government and private land owners.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Chalky, Big Green and Badger Island Groups (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/chalky-big-green-and-badger-island-groups-iba-australia on 23/12/2024.