ABSTR• CT.--The diet of the Lanner Falcon (Falco biarmicus feldeggii) was studied in an area of central Italy for one yr. Diet composition differed according to the methodology used for data collection with mammals, small passerines and insects found more frequently or exclusively in pellets. Conversely, analysis based on pluckings and observations of prey taken to the nest indicated the diet consisted of only nonpasserine and large passerine birds. Overall, the birds including European Starling (Sturnus vulgaris), Green Woodpecker (Picus viridis), and Jay (Garrulus glandarius) were the most common prey taken by Lanner Falcon. Mammals taken included wood mouse (Apodemus sp.), common dormouse (Musca'rdinus avellanarius) and Savi's pine vole (Microtus saviO.