Desembocadura del Río Bío-Bío

IBA Criteria

Year of most recent IBA criteria assessment: 2020

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Red-legged Cormorant Poikilocarbo gaimardi NT resident 2016-2020 2-38 individuals B1a
Guanay Cormorant Leucocarbo bougainvilliorum NT resident 2016-2020 28-3,000 individuals B1a
Black Skimmer Rynchops niger LC non-breeding 2016-2020 1,800 individuals A4
Franklin's Gull Larus pipixcan LC non-breeding 2008 10,000-19,999 individuals A4i
Inca Tern Larosterna inca NT non-breeding 2016-2020 4-28 individuals B1a
Elegant Tern Thalasseus elegans NT non-breeding 2016-2020 10-100 individuals A4, B1a

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2014 very high favourable negligible
Was the whole site covered? Yes State assessed by Habitat
Accuracy of information medium

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Pollution domestic & urban waste water - type unknown/unrecorded happening now whole area/population (>90%) moderate to rapid deterioration very high

Condition of habitat (state)
Habitat Habitat Detail Reference Area (ha) Actual Area (ha) % of habitat remaining % of carrying capacity (overall) Result
Marine Neritic 2500 2500 - good (> 90%) near favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Little/none of site covered (<10%) No management planning has taken place Very little or no conservation action taking place negligible
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Península de Hualpén Santuario de la Naturaleza 2,338 protected area is adjacent to site 0


IUCN Habitat Habitat detail Extent (% of site)
Marine Coastal/Supratidal -
Marine Neritic -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Desembocadura del Río Bío-Bío. Downloaded from on 08/05/2021.