Data Zone
The site was identified as internationally important for bird conservation in 2004 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 |
|---|---|---|---|---|
| Blue-tailed Imperial-pigeon Ducula concinna | LC | resident (2000) | present | A2 |
| Siau Scops-owl Otus siaoensis | CR | resident (2001) | present | A1 |
| Cittura cyanotis | NR | resident (2000) | present | A2 |
| Red-and-blue Lory Eos histrio | EN | resident (2004) | present | A1, A2 |
| Elegant Sunbird Aethopyga duyvenbodei | EN | resident (2004) | present | A1, A2 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2016) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2016 | very poor | very high | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Siau Island Tarsier Tarsius tumpara | 5,501 / 12,470 (birds) | 45 | poor | ||
| Siau Scops-owl Otus siaoensis | 0 / 1 (-) | 0 | very poor | ||
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Artificial/Terrestrial | - | poor (40–69%) | very poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | happening now | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | very high |
| Agricultural expansion and intensification | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Natural system modifications | happening now | some of population/area (10–49%) | rapid decline (>30% over 3 generations) | high |
| Climate change and severe weather | likely in short term (<4 years) | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Geological events | likely in short 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 |
| Little/none of area covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | very low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | 27 | |
| Artificial/Terrestrial | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Pulau Siau (Indonesia). Downloaded from
https://datazone.birdlife.org/site/factsheet/pulau-siau-iba-indonesia on 24/12/2024.