Data Zone
The site was identified as internationally important for bird conservation in 1999 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 |
|---|---|---|---|---|
| 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 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 1999. The most recent assessment (2017) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2017 | poor | very high | high |
| Whole site assessed? | State assessed by | Accuracy of information | |
| no | habitat | medium | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Forest | moderate (70–90%) | moderate (70–90%) | poor |
| Wetlands (inland) | good (>90%) | good (>90%) | good |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Residential and commercial development | happening now | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | very high |
| Biological resource use | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Human intrusions and disturbance | likely in long term (>4 years) | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>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 |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 2017 | Zones humides de l'Onilahy | Ramsar Site, Wetland of International Importance (V) | 24 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Shrubland | major (>10) | Bushland & thicket - deciduous |
| Forest | minor (<10) | Mangrove |
| Marine Intertidal | minor (<10) | |
| Wetlands (inland) | minor (<10) | Rivers & streams |
| Land use | % of IBA |
|---|---|
| unknown | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Saint Augustin Forest (Madagascar). Downloaded from
https://datazone.birdlife.org/site/factsheet/saint-augustin-forest-iba-madagascar on 23/12/2024.