The World Wildlife Fund divides the semi-deciduous forests into three distinct ecoregions. The Pernambuco interior forests lie west of the Pernambuco coastal forests in Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, and Sergipe states.
The World Wildlife Fund distinguishes between semi-deciduous forests into three distinct categories. The interior forests of Pernambuco are situated to the west of the coastal forests of Pernambuco in Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, and Sergipe states.