Data Zone
The site was identified as internationally important for bird conservation in 2021 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 |
|---|---|---|---|---|
| Whimbrel Numenius phaeopus | LC | non-breeding (2014–2021) | 500–838 birds | B3a |
| Grey Gull Larus modestus | LC | non-breeding (2014–2021) | 250–2,200 birds | A4, B3a |
| Franklin's Gull Larus pipixcan | LC | non-breeding (2014–2021) | 5,000–50,000 birds | A4, B3a |
| Inca Tern Larosterna inca | NT | resident (2014–2021) | 30–300 birds | B1a |
| Elegant Tern Thalasseus elegans | NT | non-breeding (2014–2021) | 30–270 birds | B1a |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2021. The most recent assessment (2020) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2020 | moderate | very high | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | good | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Coastal/Supratidal | good (>90%) | moderate (70–90%) | moderate |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| 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%) | moderate decline (10–30% over 3 generations) | high |
| Biological resource use | 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 |
| Pollution | 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 |
| Most of area (50–90%) covered (including the most critical parts for important bird species) | A management plan exists, but it is out of date or not comprehensive | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | medium |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Estero Mantagua y Desembocadura del Río Aconcagua (Chile). Downloaded from
https://datazone.birdlife.org/site/factsheet/estero-mantagua-y-desembocadura-del-río-aconcagua-iba-chile on 23/12/2024.