It is noteworthy, also, for the large number of species having arboreal habits, the density and extent of the Amazon forests favouring their development rather than the development of those of terrestrial habits.
South of the Amazon valley and filling a great part of the eastern projection of the continent, is another arid, semi-barren plateau, lying within the southeast trade winds belt, and extending from Piauhy southward to southern Bahia.
It is taken with the harpoon and its oil is one of the commercial products of the Amazon valley.
In 1669 he published his Physica subterranea, and the same year was engaged with the count of Hanau in a scheme for settling a large territory between the Orinoco and the Amazon.
The Andine sub-region extends from Peru to the Argentine and follows roughly the watershed of the Amazon.