The Flora of the ecoregion is varied, with the western portion of the region hosting tall and diverse moist evergreen and semi-deciduous forests, while the eastern portion is a mosaic of open woodlands and shrublands, with patches of dry savanna. Seasonally wet savannas are found on the lower reaches of the major rivers. The dominant tree in the region is the Babaçu palm , an oil palm that occurs naturally along the southern edge of the Amazonian forests, but whose predominance has been extended by its tolerance to human-caused fires and forest clearing. Another common species is the Carnauba palm.'' Carnauba palm is a very important palm species. It is the source of carnauba wax, which is harvested from the coating on the leaves of the tree. The fruit and pith are eaten, the leaves are variously employed and the wood is used in building. In some places like Ceará State, it is known as the "Tree of Life".
Fauna
Babaçu forests are inhabited by many animal species, some of these are found in the rivers that cut the forest extension, others live in the forest itself. Birds like macaws, parrots are common. Herons and other aquatic birds are usually seen along the rivers banks and lake margins while hunting for crustaceans and fish. There are also many species of mammals such as monkeys, wild dogs, felines, possums, armadillos, anteaters, wild pigs and the wild deer. Some species of aquatic mammals such as giant otters and river dolphins are also found there. Reptiles are also found in abundance, with many snakes and lizard species such as the green iguana and also some species of geckos. The amphibians are also abundant, being more common during the raining season, when it is possible to see a great number of toad and frog species. In the water there are many species of animals such as fishes that belong to the Cichlidae and Characidae families and many crustaceans as well, some of these are freshwater shrimps and crabs. Insects, spiders, centipedes and many other invertebrate species are very common and most of them are found during the night. Huge beetles are found in the region and their larvae, locally called "gongo" are an important nutritional source for many of the animals that live there and also for human beings that forage for nuts and occasionally are able to find some of these huge larvae.
