EN
Among 218 birds, belonging to 6 species of Paridae only in Parus major three species of Nematoda were detected: Capillaria tridens, Cardiofilaria pavlovskyi and Diplotriaena henryi. A detailed description of the morphology is given for Capilaria tridens. It is a new one for Parus major as well as for the Paridae in the Pa1earctic region.