SummaryIn the years 2012-2014, carcasses of 286 birds of prey from the territory of Slovakia were examined for the presence of helminth parasites. The number of bird species in the study was 23; fi ve belonging to the Falconiformes order, eleven to Accipitriformes, and seven to Strigiformes. A fi nding of Cestoda class comprehended 4 families: Paruterinidae (4), Dilepididae (2), Mesocestoididae (2) and Anoplocephalidae (1). Birds of prey were infected with 6 families Nematoda species of the Secernentea class: Syngamidae (1), Habronematidae (2), Tetrameridae (3), Physalopteridae (1), Acuariidae (1), and Anisakidae (2). Out of the Adenophorea class, the Capillariidae family (1) was confi rmed. The Acanthocephala group was represented by the Paleacanthocephala class, the Centrorhynchidae family (3). Out of the Trematoda class, 12 different species of fl ukes were found, belonging to the Diplostomidae (5), Cyathocotylidae (1), Strigeidae (4), Opistorchidae (1), and Plagiorchidae (1) families. The most frequent helminth species infecting diurnal birds of prey was Strigea falconis. This fl uke was confi rmed in one bird species from the Falconiformes order and in eight species from the Accipitriformes order. In nocturnal birds of prey, the most common fi nding was the acanthocephalan Centrorhynchus aluconis, identifi ed in four different host species of the Strigiformes order. In total, 23 helminth species were recorded for the fi rst time in Slovakia.