Wintering waterfowl censuses in wetlands in Spain - Euskadi Nature Information System

SEO/BirdLife has collected in this dataset nearly 30,000 wintering waterbird censuses of more than 1,600 wetlands conducted between 1965 and 2012. The survey of each wetland is carried out with binoculars and telescope in the first month of each year. The data imported from Gbif for the Autonomous Community of the Basque Country are collected here.