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The site was identified as important in 1999 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Running Coua Coua cursor	LC	resident	1997	present	A2, A3
Verreaux's Coua Coua verreauxi	LC	resident	1997	present	A1, A2, A3
Olive-capped Coua Coua olivaceiceps	LC	resident	1997	present	A3
Archbold's Newtonia Newtonia archboldi	LC	resident	1997	present	A2, A3
Red-shouldered Vanga Calicalicus rufocarpalis	VU	resident	1997	present	A2, A3
Lafresnaye's Vanga Xenopirostris xenopirostris	NT	resident	1997	present	A2, A3
Sickle-billed Vanga Falculea palliata	LC	resident	1997	present	A3
Subdesert Brush-warbler Nesillas lantzii	LC	resident	1997	present	A2, A3
Sakalava Weaver Ploceus sakalava	LC	resident	1997	present	A3

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (1999).

State (condition of the trigger species' habitats)
Habitat	Habitat detail	Reference area (ha)	Actual area (ha)	Habitat quantity (% remaining)	Habitat quality (carrying capacity)	Result
Forest		0	0	moderate (70-90%)	moderate (70-90%)	unfavourable
Wetlands (inland)		0	0	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Biological resource use	logging & wood harvesting - intentional use: subsistence/small scale	past (and unlikely to return) and no longer limiting	whole area/population (>90%)	slow but significant deterioration	low
Biological resource use	logging & wood harvesting - unintentional effects: large scale	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	work and other activities	likely in long term (beyond 4 years)	majority/most of area/population (50-90%)	very rapid to severe deterioration	high
Residential and commercial development	housing and urban areas	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Whole area of site (>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	The conservation measures needed for the site are being comprehensively and effectively implemented	high

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Zones humides de l'Onilahy	Ramsar Site, Wetland of International Importance	42,950	protected area overlaps with site	0
Tahosoa	Locally Managed Marine Area	5,000	protected area is adjacent to site	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Shrubland	Bushland & thicket - deciduous	-
Forest	Mangrove	-
Wetlands (inland)	Rivers & streams	-
Marine Intertidal		-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
unknown	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Saint Augustin Forest. Downloaded from http://datazone.birdlife.org/site/factsheet/saint-augustin-forest-iba-madagascar on 04/10/2023.