The site was identified as internationally important for bird conservation in 2020 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 |
---|---|---|---|---|
Red-legged Cormorant Poikilocarbo gaimardi | NT | resident (2016–2020) | 2–38 birds | B1a |
Guanay Cormorant Leucocarbo bougainvilliorum | NT | resident (2016–2020) | 28–3,000 birds | B1a |
Black Skimmer Rynchops niger | LC | non-breeding (2016–2020) | 1,800 birds | A4 |
Franklin's Gull Larus pipixcan | LC | non-breeding (2008) | 10,000-19,999 birds | A4i |
Inca Tern Larosterna inca | NT | non-breeding (2016–2020) | 4–28 birds | B1a |
Elegant Tern Thalasseus elegans | NT | non-breeding (2016–2020) | 10–100 birds | A4, B1a |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2020. The most recent assessment (2017) is shown below.
IBA conservation assessment | |||
---|---|---|---|
Year of assessment | State | Pressure | Response |
2017 | not assessed | high | very low |
Whole site assessed? | State assessed by | Accuracy of information | |
yes | unset | medium |
State (condition of the trigger species' populations) | |||||
---|---|---|---|---|---|
Species | Actual vs Reference (units) | % remaining | Result | ||
Peruvian Pelican Pelecanus thagus | 1,538 / 2,000 (birds) | 77 | moderate | ||
Black Skimmer Rynchops niger | 4,500 / 4,500 (birds) | 100 | good | ||
Franklin's Gull Larus pipixcan | 40,000 / 40,000 (birds) | 100 | good | ||
Elegant Tern Thalasseus elegans | 1,800 / 4,030 (birds) | 45 | poor |
State (condition of the trigger species' habitats) | |||
---|---|---|---|
Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
Marine Coastal/Supratidal | very poor (<40%) | poor (40–69%) | very poor |
Pressure (threats to the trigger species and/or their habitats) | ||||
---|---|---|---|---|
Threat | Timing | Scope | Severity | Result |
Transportation and service corridors | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
Pollution | past (and unlikely to return) and no longer limiting | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | low |
Response (conservation actions taken for the trigger species and/or their habitats) | |||
---|---|---|---|
Designation | Planning | Action | Result |
Little/none of area covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | very low |
Habitat | % of IBA | Habitat detail |
---|---|---|
Marine Neritic | major (>10) | |
Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Desembocadura del Río Bío-Bío (Chile). Downloaded from
https://datazone.birdlife.org/site/factsheet/desembocadura-del-río-bío-bío-iba-chile on 23/12/2024.