European Union action plans for eight priority bird species: Bittern (Botaurus stellaris), Gerrunginous Duch (Aythya nyroca), Steller's Eider (Polysticta stelleri), Lammergeier (gypaetus barbatus), Greater Spotted Eagle (Aquila clanga), Lesser Spotted Eagle (Aquila pomarina), Bonelli's Eagle (Hieraaetus fascuatus), Little Bustrar

OTHER ; Schaffer, Norbert, Gallo-Orsi, Umberto (2001)
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