The prevalence of Babesia in birds is probably greater than records would suggest and the disease in falcons leads to the destruction of erythrocytes, causing anemia, jaundice, and death [6]. It would be curious if these effects were not present in Accipitridae. The limited data available in the literature [6] and the frequent concurrent occurrence of bacterial, fungal, and parasitic agents [5,7] makes pathogenicity due to avian Babesia spp. still controversial.