Land birds; occurrence; point counts; winter; reproduction; migration
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The dataset contains records of land 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 dams, from February 2010 to September 2014. Sampling was performed in selected points distributed along the lower Sabor river valley. The presence and identity of bird species were assessed by visual and/or acoustic observation, with the support of binoculars. The records include taxa identified at the species or genus levels.