The Copernicus Sentinel-2B satellite collected this image of the lower reaches of the brown, sediment-rich Uruguay River where the river forms the border between Argentina and Uruguay, and is the site of the Esteros de Farrapos e Islas del Río Uruguay wetlands.
Composed of lagoons, swamps and 24 islets, the Esteros are a haven for wildlife, protected as a national park and included on the List of Wetlands of International Importance of the Ramsar Convention.
This wetland system is home to 130 species of fish, 14 species of amphibian, 104 species of bird—a quarter of all birds found in Uruguay—and 15 species of mammal, including the maned wolf, the largest canid (dog-like) species in South America.
A tourist attraction and a waterway for transport, the Esteros also play an important role in regulating flood levels and maintaining water quality as well as safeguarding the banks of the Uruguay River from erosion.
Visible to the lower left—its built structures shown in gray-white—is the Argentinian town of Gualeguaychú. On the eastern shore of the Uruguay River is the Uruguayan city of Fray Bentos, an important national harbour, famous for a plant that once exported corned beef around the world. Now inactive, this sprawling industrial complex has become a World Heritage Site.
The dark green area to the east of the Esteros is devoted to forestry, an important industry for the region. A pulp mill is located close to Fray Bentos.
Image credit: Contains modified Copernicus Sentinel data (2018), processed by ESA