Löffler
The high ornithological value is attested by the presence of about 221 species of birds, especially herons, such as the western cattle egret, the little egret, the black-crowned night heron, the grey heron, the purple heron and the squacco heron. The Eurasian spoonbill has here one of its few nesting sites in Portugal. It has a large wintering duck population, namely northern pintail and common pochard.