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Estuario de la Bahía Blanca

Site Facts

Country, State, Province/Region:

Argentina, Buenos Aires Province

Relative Location:

Located in the south-western portion of Buenos Aires Province in Argentina


38°58'11.77"S, 62° 9'33.19"W



Basis for Designation:

More than 20,000 shorebirds per year and more than 1% of the biographical population of the following species: Calidris canutus rufa, Calidris fuscicollis, Limosa haemastica, Charadrius falklandicus and Haematopus palliatus durnfordi.


262,527 hectares (648718 acres)


March 2016

Site Owner/Steward:

Provincial Organization for Sustainable Development
Municipality of Bahia Blanca
Secretary of Port Activities, Coronel Rosales
General Daniel Cerri Fishing and Sailing Club
Municipality of Coronel Rosales

Site Partners:

Universidad Nacional del Sur, Argentina

Human Population within 100 km:



Pablo F. Petracci
Research Specialist
GEKKO - Study Group for Conservation and Management
Department of Biology, Biochemistry, and Pharmacy
Universidad Nacional del Sur

Estuario de la Bahía Blanca, known locally as "Ría de Bahia Blanca", is an extensive systems of natural marshlands in the Buenos Aires Province of Argentina. This coastal wetland has unique geographical and biological characteristics and is considered one of the most important of its kind in Argentina.

Estuario de la Bahía Blanca's jurisdiction is complex spanning national, provincial, and municipal authorities as well as private properties. The site is comprised of six subsites: (1) Bahía Blanca, Bahía Falsa, and Bahía Verde Provincial Nature Reserve; (2) Islote de la Gaviota Cangrejera Provincial Nature Reserve, (3) Bahía Blanca Coastal Municipal Nature Reserve, (4) Arroyo Pareja-Isla Cantarelli Natural Area, (5) Villa del Mar Wetlands, (6) and the Humedal Cuatreros Coastal Reserve. Together the six sub-sites total 262,527 acres, making it the second largest (after Laguna Mar Chiquita) of the eight WHSRN sites in Argentina.

According to biologist Pablo Petracci, “This nomination helps to put Bahía Blanca Estuary on the international list of priority sites for migratory shorebird conservation in the Hemisphere, and, as such, helps to redouble the efforts needed for the area’s protection locally.” Petracci is Research Specialist for Gekko-Conservation and Management Studies Group in the Department of Biology, Biochemistry, and Pharmacy at Universidad Nacional del Sur, in Buenos Aires.


More information coming soon...


Pablo F. Petracci
Research Specialist
GEKKO - Conservation and Management Studies Group
Department of Biology, Biochemistry, and Pharmacy
Universidad Nacional del Sur