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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
Tasmanian Native-hen Tribonyx mortierii	LC	resident (1998–2008)	uncommon	A2, A3
Short-tailed Shearwater Ardenna tenuirostris	LC	breeding (1975–1995)	242,000 pairs	A4ii
Pied Oystercatcher Haematopus longirostris	LC	resident (1997–2005)	675–1,454 birds	A4i
Sooty Oystercatcher Haematopus fuliginosus	LC	resident (1997–2005)	310–790 birds	A4i
Double-banded Plover Charadrius bicinctus	NT	non-breeding (1997–2005)	20–1,721 birds	A4i
Hooded Plover Thinornis cucullatus	VU	resident (1997–2005)	37–68 birds	A1
Red-necked Stint Calidris ruficollis	NT	non-breeding (1997–2005)	4,430–15,726 birds	A4i
Pacific Gull Larus pacificus	LC	resident (1989)	120 pairs	A4i
Fairy Tern Sternula nereis	VU	breeding (1998–2008)	289 birds	A1, A4i
Green Rosella Platycercus caledonicus	LC	resident (1998–2008)	abundant	A2, A3
Orange-bellied Parrot Neophema chrysogaster	CR	passage (2007)	frequent	A1
Black-headed Honeyeater Melithreptus affinis	LC	resident (1998–2008)	rare	A2, A3
Strong-billed Honeyeater Melithreptus validirostris	VU	resident (1998–2008)	uncommon	A2, A3
Yellow-throated Honeyeater Nesoptilotis flavicollis	LC	resident (1998–2008)	common	A2, A3
Striated Fieldwren Calamanthus fuliginosus	LC	resident (1998–2008)	common	A3
Tasmanian Scrubwren Sericornis humilis	LC	resident (1998–2008)	common	A2, A3
Tasmanian Thornbill Acanthiza ewingii	LC	resident (1998–2008)	abundant	A2
Black Currawong Strepera fuliginosa	LC	resident (1998–2008)	common	A2, A3
Flame Robin Petroica phoenicea	LC	non-breeding (1998–2008)	frequent	A1
Dusky Robin Melanodryas vittata	VU	resident (1998–2008)	common	A2, A3
A4iii Species group - seabirds	n/a	breeding (1975–1995)	242,000 pairs	A4iii
A4iii Species group - waterbirds	n/a	non-breeding (1997–2005)	min 20,000 birds	A4iii

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
Invasive and other problematic species and genes	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Human intrusions and disturbance	happe­ning now	some of popul­ation/area (10–49%)	no or slight decline (<1% over 3 gener­ations)	low
Agricultural expansion and intensification	happe­ning now	few indivi­duals/small area (<10%)	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
1999	Unnamed (Duck Bay)	Conservation Area (V)	8
1999	Lees Point	Conservation Area (VI)	1
1999	Perkins Island	Conservation Area (VI)	<1
1999	West Inlet	Conservation Area (VI)	<1
2007	Petrel Islands	Game Reserve (VI)	<1
2011	Big Bay	Conservation Area (V)	1
2011	Kangaroo Island	Conservation Area (V)	1
2011	Montagu Island	Conservation Area (IV)	<1
2011	Wallaby Islands	Conservation Area (V)	<1
2011	Howie Island	Conservation Area (VI)	<1
2011	Harcus Island	Conservation Area (V)	<1
2011	Murkay Islets	Conservation Area (V)	<1
2011	Brick Islands	Conservation Area (VI)	<1
2011	Harbour Islets	Conservation Area (V)	<1
2012	Shell Islets	Conservation Area (V)	<1
2013	Montagu Beach	Conservation Area (V)	1

Habitat	% of IBA	Habitat detail
Marine Intertidal	major (>10)
Marine Neritic	major (>10)
Artificial/Terrestrial	minor (<10)	Improved grassland & pasture
Introduced vegetation	minor (<10)
Marine Coastal/Supratidal	minor (<10)

Land use	% of IBA
fisheries/aquaculture	major (>10)
hunting	minor (<10)
rangeland/pastureland	minor (<10)

Parts of four small protected areas are included but most of the IBA is private properties, some of which extend to low water mark.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Robbins Passage and Boullanger Bay (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/robbins-passage-and-boullanger-bay-iba-australia on 23/12/2024.