Abstract Cuckoos are known for being brood parasites, however, the majority of the family Cuculidae (Aves: Cuculiformes) raise their own young. In those brood parasitic cuckoo species, raised by their fosterers, direct contact between a parent and its offspring is unknown. Life cycle and ecology of their ectoparasites therefore remain enigmatic. Until now, only one quill mite species (Acari: Prostigmata: Syringophilidae) parasitising brood parasitic cuckoo, Cuculus canorus L., was known. Therefore, we investigated syringophilid fauna of four other parasitic species of the family Cuculidae: Cuculus solitarius Steph., Cercococcyx montanus Chap., Pachycoccyx audeberti (Schl.), and Scythrops novaehollandiae (Lath.), as well as four non-parasitic species: Crotophaga ani L., C. sulcirostris Swain., Guira guira (Gmel.) and Centropus goliath (Bonap.). We have found out that all studied parasitic species as well as one non-parasitic cuckoo, Centropus goliath, forming one phylogenetic lineage, harbour the same quil...