Data Zone
The site was identified as internationally important for bird conservation in 2014 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 |
|---|---|---|---|---|
| Black-billed Gull Larus bulleri | NT | breeding (1951–2006) | 2,374–5,789 pairs | A1, A4i |
| Black-fronted Tern Chlidonias albostriatus | EN | breeding (1993–1999) | 16–20 pairs | A1 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2014. The most recent assessment (2014) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2014 | not assessed | high | not assessed |
| Whole site assessed? | State assessed by | Accuracy of information | |
| no | unset | - | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Invasive and other problematic species and genes | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Human intrusions and disturbance | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Natural system modifications | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Pollution | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Climate change and severe weather | likely in short term (<4 years) | some of population/area (10–49%) | moderate decline (10–30% 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 |
|---|---|---|---|
| 1981 | Clifden | Scientific Reserve (Ia) | <1 |
| 1987 | Waiau River Mouth | Stewardship Area (III) | 4 |
| 1987 | Waiau River, Tuatapere | Stewardship Area (III) | 3 |
| 1987 | Wairaki River, Otahu | Stewardship Area (III) | 2 |
| 1987 | Paddock Hill | Stewardship Area (III) | 2 |
| 1987 | Waiau River, Monowai Road | Stewardship Area (III) | <1 |
| 1987 | Clifden | Stewardship Area (III) | 1 |
| 1987 | Waiau River, Otahu | Stewardship Area (III) | <1 |
| 1987 | Mangapiri Forest | Stewardship Area (III) | <1 |
| 1987 | Waiau Lagoon | Stewardship Area (III) | <1 |
| 1987 | Bluecliffs Beach Road | Stewardship Area (III) | <1 |
| 1987 | Waiau River, Piko Piko | Stewardship Area (III) | <1 |
| 1987 | Taylors Bush Forest | Stewardship Area (III) | <1 |
| 1987 | Molyneaux Wetland | Stewardship Area (III) | <1 |
| 1987 | Waiau River, Merrivale | Stewardship Area (III) | <1 |
| 1987 | Waiau River Mouth | Stewardship Area (III) | 1 |
| 1987 | Ferry Reserve | Stewardship Area (III) | <1 |
| 1987 | Waiau River, Monowai Road | Stewardship Area (III) | <1 |
| 1987 | Waiau River, Piko Piko | Stewardship Area (III) | <1 |
| 1987 | Waiau River, Monowai Road | Stewardship Area (III) | <1 |
| 1993 | Land Held For Cons Purposes | Stewardship Area (III) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Introduced vegetation | major (>10) | |
| Shrubland | major (>10) | |
| Wetlands (inland) | major (>10) | |
| Marine Intertidal | minor (<10) | |
| Marine Neritic | minor (<10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Waiau River Southland (New Zealand). Downloaded from
https://datazone.birdlife.org/site/factsheet/waiau-river-southland-iba-new-zealand on 23/12/2024.