Digenetic trematode of some aquatic birds from eastern province in Saudi Arabia

122 aquatic birds, 35 red shank (Tringa totanus), 24 common snip (Gallinago gallinago), 48 moorhen (Gallinula chloropus), 15 Teal (Anas crecca) trapped near the cost of Al- Qateef area in the eastern province, Saudi Arabia, were examined for helminth parasites. 35 birds (28.68%) were infected with one or more helminth parasites, 31 T. totanus (88.57%), 2 G. gallinago (8.33%), 2 A. crecca (13.33%) and none in C. chloropus. The isolated helminthes belong to six families and eight species. Bilharziellia polonica (22.86), Acanthoparyphum phoeincopteri (11.43), (8.33), (6.66) in different birds respectively, Himasthla rhigedana (14.3), Psilochasmus aglyptorchis (6.66), Knipowitschiatrema nico/ai (2.8), Spelophalls sp. (2.8) Diacetabulurn curviclon (42.9), Cyclocoelurn microstomum (5.7).