The Coccidia of Strigiformes (owls)

Donald W. Duszynski1, Lee Couch1, and Steve J. Upton2
1Department of Biology, University of New Mexico
2Division of Biology, Kansas State University

Supported by NSF-PEET DEB 9521687

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Updated: 25 August 2000
Comments: or

  1. Eimeria atheni Chauhan and Jain, 1979
    1. Host: Athene brama (Spotted little owl)
    2. Reference: Chauhan and Jain 1979

  2. Eimeria bemricki Averbeck, Cooney, Guarnera, Redig, and Stromberg, 1998
    1. Host: Strix nebulosa (Great gray owl)
    2. Reference: Averbeck et al. 1998

  3. Eimeria bubonis Cawthorn and Stockdale, 1981
    1. Host: Bubo virginianus (Great-horned owl)
    2. References: Cawthorn and Stockdale 1980, 1981, 1982; Upton et al. 1990

  4. Eimeria megabubonis Upton, Campbell, Weigel, and McKown, 1990
    1. Host: Bubo virginianus (Great-horned owl)
    2. Reference: Upton et al. 1990

  5. Eimeria nycteae Volf, Koudela, and Modry, 1999
    1. Host: Nyctea scandiaca (Snowy owl)
    2. Reference: Volf et al. 1999

  6. Eimeria speotytoi Carini, 1939
    1. Synonym: Eimeria spenotytoi (Carini, 1939) Upton, Campbell, Weigel, and McKown, 1990, lapsus
    2. Host: Speoyto cunicularia (Burrowing owl)
    3. Reference: Carini 1939

  7. Eimeria sp. of Gottschalk, 1972
    1. Host: Bubo bubo (Northern eagle owl)
    2. Reference: Gottschalk 1972

  8. Eimeria sp. 2 of Huber, 1964
    1. Host: Asio otus (Long-eared owl)
    2. Reference: Huber 1964

  9. Eimeria sp. 4 of Huber, 1964
    1. Host: Strix aluco (Tawny owl)
    2. Reference: Huber 1964

  10. Eimeria sp. 5 of Huber, 1964
    1. Host: Tyto alba (Barn owl)
    2. Reference: Huber 1964

  11. Eimeria strigis Kutzer, 1963
    1. Host: Strix aluco (Tawny owl)
    2. Reference: Kutzer 1963

  12. Eimeria varia Upton, Campbell, Weigel, and McKown, 1990
    1. Host: Strix aluco (Tawny owl)
    2. Reference: Upton et al. 1990

  13. Isospora buteonis Henry, 1932 of Nieschulz, 1935
    1. Host: Tyto alba (Barn owl)
    2. Reference: Nieschulz 1935
    3. Remarks: This is a Sarcocystis sp.

  14. Isospora strigis Yakimoff and Matschoulsky, 1937
    1. Host: Asio flammeus (Short-eared owl)
    2. Reference: Yakimoff and Matschoulsky 1937
    3. Remarks: This appears to be an avian isosporan ingested with the prey

  1. Unidentified renal coccidian of Helmboldt, 1967
    1. Host: Bubo virginianus (Great-horned owl)
    2. Reference: Helmboldt 1967

  2. Unidentified intestinal coccidian of Hoberg, Cawthorn, and Hedstrom, 1993
    1. Synonym: Isospora sp. Hoberg, Cawthorn, and Hedstrom, 1993
    2. Host: Strix occidentalis (Spotted owl)
    3. Reference: Helmboldt 1967


Averbeck, G.A., Cooney, J.D., Guarnera, T.R., Redig, P., and Stromberg, B.E. 1998. Exogenous stages of Eimeria bemricki n. sp. (Apicomplexa: Eimeriidae) from the great gray owl, Strix nebulosa (Foster). Journal of Parasitology 84: 976-977.

Carini, A. 1939. Sobre uma eimeria da coruja do campo. Archivos de Biologia, Sao Paulo 23: 84-85.

Cawthorn R.J., and Stockdale, P.H.G. 1980. Developmental cycle of a new species of Eimeria (Protozoa: Eimeriidae) in great horned owls, Bubo virginianus. Proceedings of the 55th annual meeting of the American Society of Parasitologists, 4-8 August 1980, University of California, Berkeley. Abstract 142, Pp. 63.

Cawthorn R.J., and Stockdale, P.H.G. 1981. Description of Eimeria bubonis sp. n. (Protozoa: Eimeriidae) and Caryospora bubonis sp. n. (Protozoa: Eimeriidae) in the great horned owl, Bubo virginianus (Gmelin), of Saskatchewan. Canadian Journal of Zoology 59: 170-173.

Cawthorn R.J., and Stockdale, P.H.G. 1982. Oocyst production, late-stage merogony, gametogony, and cross-transmission studies of Eimeria bubonis (Protozoa: Eimeriidae) of the great horned owl, Bubo virginianus. Canadian Journal of Zoology 60: 2279-2283.

Chauhan, M.P.S., and Jain, S.P. 1979. A new coccidium, Eimeria atheni from a spotted owlet, Athene brama (Temminck). Rivista di Parassitologia 40: 167-169.

Gottschalk, C. 1972. Beitrag zur Faunistik der Vogelkokzidien Thuringens und Sachsens. Beitraege zur Vogelkunde, Leipzig, 18: 61-69.

Helmboldt, C.F. 1967. An unidentified protozoan parasite in the kidney of the great-horned owl (Bubo virginianus). Bulletin of the Wildlife Disease Association 3: 23-25.

Henry, D. 1932. Isospora buteonis sp. nov. from the hawk and owl, and notes on Isospora lacazii (Labbe) in birds. University of California Publications in Zoology 37: 291-299.

Hoberg, E.P., Cawthorn, R.J., and Hedstrom, O.R. 1993. Enteric coccidia (Apicomplexa) in the small intestine of the Northern spotted owl (Strix occidentalis caurina). Journal of Wildlife Diseases 29: 495-497.

Huber, E. 1964. Die Endoparasiten von Vogelen des Munchner Tierparks Hellabrunn unter besonderer Berucksichtigung der jahreszeitlichen Schwankungen in der Wurmausscheidung. PhD dissertation, Universitat Munchen, Munich. 45 pp.

Kutzer, E. 1963. Eimeria strigis spec. nov., ein neues Kokzid aus dem Waldkauz. Archiv fur Protistenkunde 106: 378-380.

Markus, M.B., and Mundy, P.J. 1979. Intestinal Sarcocystis infection in vultures and its significance. Parasitology 79: 39.

Nieschulz, O. 1935. Notes de Parasitologie. Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. II. Abteilung Originale 92: 279-280.

Rakhamullina, N.K. and Svanaev, S.K. 1971. Some data on the coccidia in wild birds in Kazhakistan. Akademaii Nauk Kazhakskoii SSR, Trudy Instituta Zoologii 31: 171-177.

Upton, S.J., Campbell, T.W., Weigel, M., and McKown, R.D. 1990. The Eimeriidae (Apicomplexa) of raptors: review of the literature and description of new species of the genera Caryospora and Eimeria. Canadian Journal of Zoology 68: 1256-1265.

Volf, J., Koudela, B., and Modry, D. 1999. Eimeria nycteae sp. n. (Apicomplexa: Eimeriidae), a new parasite species from the snowy owl. Folia Parasiotologica 46: 168-170.

Yakimoff, W.L., and Matschoulsky, S.N. 1937. Isospora strigis n. sp., eine neue Eulencoccidie. Archiv fur Protistenkunde 88: 286-288.