The mouth of the Amazon river is located in Northern Brazil. The ecoregion of this area is described as neotropical.
The area where the mouth of the Amazon River is located in eastern Brazil features a number of islands. These islands are dotted throughout the river. As it is flush with water, the river carries nutrient-rich soil down the river. Because of this, there is less plant diversity. The vegetation in the region is shorter, but the area is dominated by palm trees.
Among fauna, birds are the most populous creature at the mouth of the Amazon River. There are approximately 540 species.