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 |
|---|---|---|---|---|
| Grey Gull Larus modestus | LC | non-breeding (2016–2021) | 400–2,500 birds | A4, B3a |
| Peruvian Tern Sternula lorata | EN | breeding (2016–2021) | 274–700 birds | A1, A4, B3a |
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 | poor | 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%) | poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Pollution | happening now | whole of population/area (>90%) | moderate decline (10–30% over 3 generations) | very high |
| Invasive and other problematic species and genes | happening now | whole of population/area (>90%) | moderate decline (10–30% over 3 generations) | very high |
| Biological resource use | happening now | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | very high |
| Human intrusions and disturbance | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Energy production and mining | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Residential and commercial development | likely in short term (<4 years) | some of population/area (10–49%) | rapid decline (>30% over 3 generations) | high |
| Transportation and service corridors | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Climate change and severe weather | likely in long term (>4 years) | whole of population/area (>90%) | 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 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 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| 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 23/12/2024.