Open plains used for non-intensive cultivation of cereals (mainly wheat), with sparse woodland of evergreen oak Quercus ilex. Due to the poor soils, cereals are grown on crop rotations of long duration. Fallow land is used for grazing sheep and cattle. There is scattered human habitation.
The area is of great importance for breeding birds of steppic habitats, especially Otis tarda (the most important site in Portugal).
BirdLife International (2019) Important Bird Areas factsheet: Castro Verde plains. Downloaded from http://www.birdlife.org on 22/03/2019.