Data Zone
The site was identified as internationally important for bird conservation in 2009 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 |
|---|---|---|---|---|
| Partridge Pigeon Geophaps smithii | LC | resident (2001–2002) | 1,000–2,500 birds | A1, A2, A3 |
| Chestnut Rail Eulabeornis castaneoventris | LC | resident (2000) | uncommon | A2 |
| Bush Thick-knee Burhinus grallarius | LC | resident (1998–2008) | frequent | A1 |
| Beach Thick-knee Esacus magnirostris | NT | resident (-) | 26 pairs | A1 |
| Great Knot Calidris tenuirostris | EN | non-breeding (1990–2002) | 12,000 birds | A4i |
| Red Goshawk Erythrotriorchis radiatus | EN | resident (2006) | 80–160 birds | A1 |
| Northern Rosella Platycercus venustus | LC | resident (1998–2008) | common | A3 |
| Varied Lorikeet Psitteuteles versicolor | LC | resident (1998–2008) | common | A3 |
| Rainbow Pitta Pitta iris | LC | resident (1998–2008) | uncommon | A2, A3 |
| Silver-crowned Friarbird Philemon argenticeps | LC | resident (1998–2008) | abundant | A3 |
| Bar-breasted Honeyeater Ramsayornis fasciatus | LC | resident (1998–2008) | frequent | A3 |
| White-gaped Honeyeater Stomiopera unicolor | LC | resident (1998–2008) | frequent | A3 |
| Yellow-tinted Honeyeater Ptilotula flavescens | LC | resident (1998–2008) | common | A3 |
| Australian Yellow White-eye Zosterops luteus | LC | resident (1998–2008) | common | A3 |
| Masked Finch Poephila personata | LC | resident (1998–2008) | rare | A3 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2009. The most recent assessment (2019) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2019 | not assessed | high | not assessed |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | unset | - | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Natural system modifications | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Invasive and other problematic species and genes | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| 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 |
|---|---|---|---|
| 1991 | Kakadu | National Park (II) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 2 | Tussock grasslands |
| Wetlands (inland) | 2 | Ephemeral |
| Forest | major (>10) | Eucalypt woodlands; Eucalypt open forests; Eucalypt tall open forests; Melaleuca forests & woodlands; Rainforest & vine thickets; Mangroves |
| Marine Intertidal | major (>10) | |
| Artificial/Terrestrial | minor (<10) | Forestry plantations; Urban parks & gardens |
| Land use | % of IBA |
|---|---|
| other | major (>10) |
| forestry | minor (<10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tiwi Islands (Australia). Downloaded from
https://datazone.birdlife.org/site/factsheet/tiwi-islands-iba-australia on 23/12/2024.