EDIA – Global Bird Monitoring Program of the Alqueva Dam (EFMA) Secondary Irrigation Network (block D: block D: irrigation blocks of (irrigation blocks of Alvarrão, Brinches, Brinches-Enxoé, Caliços-Machado, Caliços-Moura, Orada-Amoreira, Pias and Serpa): Bird Atlas – population trends [winter/spring 2021]

The dataset contains records of all birds collected in the area of the block D of the Secondary Irrigation Network of the Alqueva Dam (irrigation blocks of Alvarrão, Brinches, Brinches-Enxoé, Caliços-Machado, Caliços-Moura, Orada-Amoreira, Pias and Serpa) and in a control zone, performed within the General Bird Monitoring Plan of the area, promoted by EDIA, S.A. Data were collected in the spring of 2021 and winter 2022, in 113 sampling squares of 1x1 km (UTM grid), distributed in the area affected by the Irrigation Block (93 “impact” squares) and in a control area (20 “control” squares), stratified by habitat.

The most abundant species (>1000 records) were Sturnus unicolor (3572 records), Delichon urbicum (1904), Passer hispaniolensis (1886), Emberiza calandra (1407) and Streptopelia decaocto (1108).