The confluence between Po and Stura di Lanzo rivers in Turin (NW Italy) is one of the most important wintering sites in North West Italy for diving ducks. The most interesting species are Pochard, Aythya ferina, and Tufted duck, Aythya fuligula. A subject with hybrid traits was observed for the first time in winter 2002-2003. Hybrids number were exceptionally high in winter 2006-2007 when the percentage was 5 per 1000 of the total wintering birds.
RIO - Rivista Italiana di Ornitologia [eISSN 2385-0833 - pISSN 0035-6875] is published online by PAGEPress®, Pavia, Italy, on behalf of Società Italiana di Scienze Naturali and Museo Civico di Storia Naturale di Milano, Italy. Autorizzazione del Tribunale di Milano n. 1045 del 12/01/1949. All credits and honors to PKP for their OJS.