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 separates the semi-deciduous forests into three separate zones. The interior forests of Pernambuco are positioned west of the coastal forests of Pernambuco in Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, and Sergipe states.