Data Zone
The site was identified as internationally important for bird conservation in 2012 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| White-winged Petrel Pterodroma leucoptera | VU | breeding (2004–2007) | 5,000–18,000 breeding pairs | A1, A4ii |
| Tahiti Petrel Pseudobulweria rostrata | NT | breeding (2012) | 50-249 breeding pairs | A1 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2012. The most recent assessment (2012) is shown below.
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2012 | favourable | high | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | poor | |
| State (condition of the key species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Neritic | good (>90%) | good (>90%) | favourable |
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | happening now | some of population/area (10–49%) | slow deterioration (1–10% over 3 generations) | medium |
| Pollution | happening now | most of population/area (50–90%) | no deterioration (<1% over 3 generations) | low |
| Climate change and severe weather | likely in long term (beyond 4 years) | whole population/area (>90%) | no deterioration (<1% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of site covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | very low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1957 | Parc du lagon de Bourail: Roche Percee and Baie des tortues | Special Marine Reserve (III) | - |
| 1993 | Casy Islet | Special Marine Reserve (II) | - |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Neritic | 100 |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Grand Sud Marin (New Caledonia (to France)). Downloaded from
https://datazone.birdlife.org/site/factsheet/grand-sud-marin-iba-new-caledonia-(to-france) on 20/01/2025.