Reserva Costa Atlántica, Nature reserve in Rio Grande, Argentina

Reserva Costa Atlántica extends along the eastern shore of Tierra del Fuego and includes tidal flats, bays, and coastal areas. The reserve protects different habitats where water and land meet, supporting a variety of animal and plant life.

The area was recognized as a Ramsar site in 1995 and received protection status through provincial law in 1998. These measures came from the need to safeguard the unique coastal ecosystem and the migratory birds that stop here.

The reserve's name refers to the Atlantic coast of Tierra del Fuego, and its shorebird concentrations are counted each season: 43% of South America's Hudsonian godwit population, 13% of the continent's red knot and 32% of the Atlantic coast's white-rumped sandpiper use the site. It is also a nesting area for the endangered ruddy-headed goose.

San Sebastian Bay offers good observation points, especially during migration periods when thousands of shorebirds gather. Comfortable clothing and binoculars help you watch the birds from a distance.

The reserve's intertidal flats at San Sebastián Bay cover 16,000 hectares of mud at low tide, where 43% of South America's Hudsonian godwit population feeds. Around 21 cetacean species breed and feed in its waters, including one of the highest recorded densities of Commerson's dolphin off Tierra del Fuego.