Blood films from 46 fish crows (Corvus ossifragus Wilson) and 42 American crows (Corvus brachyrhynchos Brehm) from Florida, U.S.A., were examined for blood parasites. Haemoproteus picae Coatney and Roudabush, Haemoproteus danilewskii Kruse, Trypanosoma avium (Danilewsky), and microfilariae of an unidentified filarioid were identified from both species of crows. An unidentified species of Haemoproteus and Trypanosoma ontarioensis Woo and Bartlett were observed in American crow blood films. Fish crow blood films contained Plasmodium relictum Celli and Sanfelice. Prior to this study, T. avium and P. relictum had not been reported from fish crows.
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