The Atlas of Wintering Birds in Italy - AIRONE project (2010-2025)

The data were collected through the web portal Ornitho.it , managed by the Centro Italiano Studi Ornitologici (CISO) in collaboration with other Italian national and regional ornithological and nature conservation organizations (see Ornitho.it Partner Page ) in the framework of two different citizen science projects, the "Atlante degli uccelli d'Italia in inverno" (winters 2010-2011 to 2015-2016) and the AIRONE project (winter 2024-2025).

The data went through a careful, expert-based evaluation process and only validated data are included in the dataset. Original observation data were aggregated by month and by 1 km grid units of the Universal Transverse Mercator (UTM) spatial grid, and occurrences thus have a spatial accuracy of 1 km and a temporal accuracy of 1 month. The coordinates associated with each record are the geographic coordinates (EPSG:4326) of the centroids of each 1 km UTM grid cell.