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Journal of Wildlife Diseases, 44(2), 2008, pp. 475-479
© Wildlife Disease Association  2008
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SHORT COMMUNICATION

Survey of Blood Parasites in Two Forest Owls, Northern Saw-whet Owls and Flammulated Owls, of Western North America

 Lynda L. Leppert1,5,4, Alfred M. Dufty, Jr.1, Sarah Stock2, M. David Oleyar1 and Greg S. Kaltenecker3

1 Boise State University, Biology, 1910 University Drive, Boise, Idaho 83725, USA
2 University of Idaho, Biology, Mines321, Moscow, Idaho83844-3025, USA
3 Idaho Bird Observatory, Department of Biology, Boise State University, 1910 University Drive, Boise, Idaho 83725, USA
5 Corresponding author (email: lyndal{at}alaskasealife.org)

ABSTRACT:   Except for a few studies in the eastern United States, little has been published on hemoparasites in owls. We surveyed the blood parasites of 108 Northern Saw-whet Owls (Aegolius acadicus) and 24 Flammulated Owls (Otus flammeolus) in Idaho during autumn migration in 1999 and 2000. We also surveyed 15 Flammulated Owls (FLOW) during breeding season in Utah from 2000. Leucocytozoon ziemanni, Haemoproteus syrnii, Haemoproteus noctuae, and Trypanosoma avium were identified. The overall prevalence of infection was 53% (78/147) and for the combined species, prevalences of Haemoproteus, Leucocytozoon, and Trypanosoma species were 20%, 39%, and 4%, respectively. Northern Saw-whet Owls (NSWO) had an overall prevalence of 51% (55/108), with prevalences of 6%, 47%, and 4% by hemoparasite genus, respectively. Flammulated Owls had an overall prevalence of 59% (23/39), with prevalences of 56%, 18%, and 5% by genus, respectively. This study provides baseline hematozoa information for two boreal owl species.
  Key words:  Aegolius acadicus, breeding, Flammulated Owl, Haemoproteus, hemoparasites, Idaho, Leucocytozoon, migration, Northern Saw-whet Owl, Otus flammeolus, Strigidae, Trypanosoma.

4 Current address: Alaska Sea Life Center, PO Box 1329, Seward, Alaska 99664, USA






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