The Miño estuary (northwest of the Iberian Peninsula) is included in two natural protected areas of the EU Natura 2000 Galician network, one under the Habitats Directive (Site of Community Importance Baixo Miño), and other under the Birds Directive (Bird Special Protection Area Esteiro do Miño); the last cataloging deal with areas of particular relevance for migratory or endangered birds that requires a status of protection to ensure their protection and conservation. Moreover, the Miño estuary comprises a total of 32 habitats classified of Community interest by the European Habitats Directive, where numerous species of aquatic birds can be observed, especially during overwinter and migratory periods. The local naturalist association ANABAM is developing a number of activities for the conservation, study, divulgation and defense of the natural environment of the Baixo Miño area. Here, we emphasize the ornithological values of this area focusing on the water birds. A total of 79 species were recorded during the censuses carried out during the autumn-winter seasons of the last 26 years. They belong to 20 families included in 9 orders. Moreover, we describe two activities developed by ANABAM that are specially related to birding: guided birding tours and a campaign of birding tourism. More than 10,000 persons (mostly primary and high school students) had attended these two activities. In addition to the promotion of birding, these actions are also aimed to divulgate the natural values of the Baixo Miño area