The Guajira/Barranquilla ecoregion along the Caribbean Sea in Venezuela and Colombia is a unique xerophytic area in the neotropics. Proposed as a bird center of endemism, this arid habitat is dominated by thorn scrub and succulents.
Situated primarily in southeastern Venezuela, the Guayanan Highlands ecoregion is distinct from other ecoregions in Amazonia due to its montane physiography. It hosts vast expanses of tall primary rain forest and open, treeless or nearly treeless savannas interrupted by gallery forests.
Located on the northeast coast of South America, the Guianan Moist Forests ecoregion is one of the largest continuous tracts of relatively pristine lowland tropical rain forest in the world. It holds a wide variety of regional biodiversity with high levels of species endemism and richness.
The Guianan savanna is an ecoregion in the south of Venezuela, Guyana and Suriname and the north of Brazil. The savanna covers an area of rolling upland plains on the Guiana Shield between the Amazon and Orinoco basins.
The Humid Pampas occupy the plains in the east of Argentina and occupy one of the highest human-populated areas in Argentina, taking up most of the province of Buenos Aires. Horizontal plains and very soft undulations with low peaks that emerge like islands characterize the relief of this area.
The Lesser Antilles mangrove ecoregion is comprised of a chain of islands at the southeastern edge of the Caribbean Sea from Sombrero and Anguilla in the north, to Grenada in the south. The largest areas of mangrove are found on Antigua and Barbuda, Guadeloupe, Martinique, and the U.S. Virgin Islands.
Los Llanos is a vast tropical grassland plain situated to the east of the Andes in Colombia and Venezuela, in northwestern South America. It is an ecoregion of the flooded grasslands and savannas biome.
The Los Petenes-Ría Celestún and& Petenes mangrove ecoregion forms a coastal corridor of wetlands in excellent state of preservation. This system forms a unique biogeographical area in Mexico, of great ecological value for its large faunistic and floristic diversity, including the unique Peten mangrove.
The Magdalena Valley dry forests ecoregion is located in Colombia along the upper Magdalena River. There are many endemic species, but much of the original habitat has been destroyed by agriculture and over-grazing.
The Magdalena Valley montane forests ecoregion is located in the Andes mountains of central Colombia. The ecoregion covers the higher land on both sides of the valley of the Magdalena River in the Colombian Andes. These montane forests have a wet climate, usually with cloud forests.