A nestling starling (Sturnus vulgaris) which had fallen from its nest was presented to the Department of Pathology in comatose situation. During the physical examination, the bird died and necropsy was performed. At the microscopical examination of the blood smears, numerous Leucocytozoon agents were observed. At necropsy, there was no remarkable lesion observed, except for slight enlargement of the spleen. Blood smears were also admitted to the Department of Parasitology for diagnosis of the agents and upon the morphological appearance and relevant literature; they were identified as Leucocytozoon dubreuili. This is the first report of Leucocytozoon dubreuili identification in a starling.