The dataset contains occasional records of cliff-nesting bird species of high conservation priority, namely birds of prey (Aves, Accipitriformes and Falconiformes), 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. Data include both occasional observations and observations in the fixed points used to monitor the target species, but performed outside the regular census program. Observations came from all the study area around the Sabor river, from its mouth up to 42 km upstream. The presence and identity of the birds seen were assessed by visual observation with binoculars and/or telescope. The records include taxa identified at the species level.