Data Zone
The site was identified as internationally important for bird conservation in 2010 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Whimbrel Numenius phaeopus | LC | winter (2008) | 1,500 individuals | A4i |
| Grey Gull Larus modestus | LC | non-breeding (2008) | 2,000 individuals | A4i |
| Franklin's Gull Larus pipixcan | LC | non-breeding (2007) | max 10,000 individuals | A4i |
| Elegant Tern Thalasseus elegans | NT | unknown (2008) | 1,400 individuals | A1, A4i |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2020) is shown below.
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2020 | near favourable | very high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | good | |
| State (condition of the key species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Coastal/Supratidal | good (>90%) | moderate (70–90%) | near favourable |
| Marine Intertidal | - | good (>90%) | near favourable |
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Invasive and other problematic species and genes | happening now | whole population/area (>90%) | moderate deterioration (10–30% in 3 generations) | very high |
| Biological resource use | happening now | whole population/area (>90%) | moderate deterioration (10–30% in 3 generations) | very high |
| Residential and commercial development | happening now | whole population/area (>90%) | slow deterioration (1–10% over 3 generations) | high |
| Climate change and severe weather | happening now | whole population/area (>90%) | slow deterioration (1–10% over 3 generations) | high |
| Pollution | happening now | most of population/area (50–90%) | slow deterioration (1–10% over 3 generations) | high |
| Geological events | likely in short term (within 4 years) | whole population/area (>90%) | moderate deterioration (10–30% in 3 generations) | high |
| Human intrusions and disturbance | happening now | some of population/area (10–49%) | no deterioration (<1% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Some of site covered (10–49%) | No management plan exists, but the management planning process has begun | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | major (>10) | |
| Marine Intertidal | major (>10) | |
| Marine Neritic | major (>10) |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Desembocadura del Río Maipo (Chile). Downloaded from
https://datazone.birdlife.org/site/factsheet/desembocadura-del-río-maipo-iba-chile on 19/01/2025.