Grup d'Anellament de Calldetenes-Osona

Our passion for Great Cormorants (Phalacrocorax carbo) has done that from 2007 we started one of the most important projects of our group.

The project is about to obtain as much information as possible about their biology, fenology and ecology of these birds (migration routes, wintering area, and so on). We work with coloured rings and field-readable rings.