The dataset contains records of aquatic and riparian birds (Aves) collected in the lower valley of River Sabor (NE Portugal), in the scope of the long-term Ecological Monitoring Program (PME) of the Baixo Sabor Hydroelectric Dams (AHBS), promoted by EDP – Energias de Portugal, S.A. This dataset includes results of surveys made in and around the area affected by the dam, from February 2010 to September 2014. Sampling was performed in selected points distributed along the lower Sabor river valley, from the river mouth up to 42 km upstream. The presence and identity of birds were assessed by visual and/or acoustic observation with binoculars and/or telescope. The records include taxa identified at the species or genus levels.