EN
Helminthofauna of 473 birds from Corvidae family, derived from Warsaw, and Warsaw, Gdańsk, Cracov and Rzeszów voivodeships was examined in the years 1962-1964. The parasites identified in the preliminary period of work are enumerated in table. The author discusses in detail the incidence of parasites from Syngamus genus; they could not be found in the north part of Poland occurring in slight numbers in Warsaw and south regions of the Country, but their massive incidence was encountered in some regions near Warsaw (Grójec), Corvus frugilegus being the most common.