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Location Chile, Región de Valparaíso
Central coordinates 71o 30.49' West  32o 53.00' South
IBA criteria A1, A4i
Area 275 ha
Year of IBA assessment 2010

Comité Nacional Pro Defensa de la Flora y Fauna (Affiliate)

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Humboldt Penguin Spheniscus humboldti breeding  2009  12 breeding pairs  good  A1  Vulnerable 
Whimbrel Numenius phaeopus non-breeding  2008  500 individuals  unknown  A4i  Least Concern 
Elegant Tern Thalasseus elegans passage  2008-2010  50-249 individuals  poor  A1  Near Threatened 
Inca Tern Larosterna inca resident  2009  80-120 breeding pairs  good  A1  Near Threatened 

IBA Monitoring

2014 low favourable negligible
Medium - based upon reliable but incomplete / partially representative data

Residential and commercial development housing and urban areas happening now small area/few individuals (<10%) moderate to rapid deterioration low

Marine Coastal/Supratidal   285 285 100 good (> 90%) favourable

Little/none of site covered (<10%)  No management planning has taken place  Very little or no conservation action taking place  negligible 


IUCN habitat Habitat detail Extent (% of site)
Marine Coastal/Supratidal   -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Estero Mantagua y Desembocadura del Río Aconcagua. Downloaded from on 27/10/2016

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