EN
Studies were carried out on 25 pheasants belonging to 13 Phasianinae species of the Phasianidae family. The research material was collected from private breeders – both Polish and from abroad. The results confirm that the most frequent nematode is Heterakis gallinarum, while for the first time in the country – in two of the examined birds of Polish flocks – the occurrence of Heterakis isolonche was found.