Data Zone
The site was identified as internationally important for bird conservation in 2006 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 |
|---|---|---|---|---|
| Masked Booby Sula dactylatra | LC | breeding (1991–2004) | 5,100 birds | A4ii |
| Brown Noddy Anous stolidus | LC | breeding (1998–2004) | 18,700 birds | A4i |
| Black Noddy Anous minutus | LC | breeding (2004) | 1,750 birds | A4i |
| Sooty Tern Onychoprion fuscatus | LC | breeding (-) | 140,000 birds | A4i |
| A4iii Species group - waterbirds | n/a | breeding (-) | 100,000-499,999 birds | A4iii |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2006. The most recent assessment (2024) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2024 | good | high | not assessed |
| Whole site assessed? | State assessed by | Accuracy of information | |
| no | habitat | poor | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | good (>90%) | good (>90%) | good |
| Rocky areas (eg. inland cliffs, mountain peaks) | good (>90%) | good (>90%) | good |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Climate change and severe weather | likely in long term (>4 years) | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | high |
| 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 |
|---|---|---|---|
| 1979 | Reserva Biológica Atol Das Rocas | Reserva Biológica (Ia) | 100 |
| 2001 | Brazilian Atlantic Islands: Fernando de Noronha and Atol das Rocas Reserves | World Heritage Site (natural or mixed) (UA) | 8 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | major (>10) | |
| Rocky areas (eg. inland cliffs, mountain peaks) | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Atol das Rocas (Brazil). Downloaded from
https://datazone.birdlife.org/site/factsheet/atol-das-rocas-iba-brazil on 23/12/2024.