Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Grey Gull Larus modestus | LC | non-breeding | 2016-2021 | 400-2,500 individuals | A4, B3a |
| Peruvian Tern Sternula lorata | EN | breeding | 2016-2021 | 274-700 individuals | A1, A4, B3a |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2021) may differ.
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2021. The most recent assessment (2021) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2021 | unfavourable | very high | high |
| 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 | moderate (70-90%) | moderate (70-90%) | unfavourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | happening now | majority/most of area/population (50-90%) | very rapid to severe deterioration | very high |
| Pollution | happening now | whole area/population (>90%) | moderate to rapid deterioration | very high |
| Human intrusions and disturbance | happening now | whole area/population (>90%) | moderate to rapid deterioration | very high |
| Invasive and other problematic species and genes | happening now | whole area/population (>90%) | moderate to rapid deterioration | very high |
| Residential and commercial development | likely in short term (within 4 years) | some of area/population (10-49%) | very rapid to severe deterioration | high |
| Energy production and mining | happening now | majority/most of area/population (50-90%) | moderate to rapid deterioration | high |
| Climate change and severe weather | likely in long term (beyond 4 years) | whole area/population (>90%) | slow but significant deterioration | medium |
| Transportation and service corridors | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Most of site (50-90%) covered (including the most critical parts for important bird species) | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | The conservation measures needed for the site are being comprehensively and effectively implemented | high |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bahía de Mejillones (Chile). Downloaded from
https://datazone.birdlife.org/site/factsheet/bahía-de-mejillones-iba-chile on 23/11/2024.