Parasite Infections in Nestling Red-Shouldered Hawks (Buteo lineatus) in Northeast Wisconsin

Abstract Red-shouldered hawks (Buteo lineatus) are threatened in Wisconsin and long-term data suggest that nest productivity is low in the state for unknown reasons. Our objective was to determine whether red-shouldered hawks in northeast Wisconsin were infected with parasites that could contribute to low nest productivity. We examined nestlings for the presence of Trichomonas gallinae, Protocalliphora avium, and blood parasites in June 2006 and 2007. We did not detect T. gallinae in throat swabs taken from 24 nestlings in 2007. Ear canals of nestlings were parasitized by P. avium larvae in 10 of 11 (91%) nests and in 22 of 24 (92%) nestlings. Larvae were found in higher intensity in 1 ear relative to the other. Leucocytozoon toddi was present in 90.5% (38/42) of the nestlings. At least 1 bird in each nest was infected. Intensity of L. toddi averaged 48.6 ± 58.3 infected cells per 2,000 erythrocytes (2.4 ± 2.9%). No other blood parasites were identified.

[1]  M. Friend,et al.  Field Manual of Wildlife Diseases - General Field Procedures and Diseases of Birds , 2012 .

[2]  Anthony Rinaldi,et al.  Nest Density, Productivity, and Habitat Selection of Red-Shouldered Hawks in a Contiguous Forest , 2008 .

[3]  Peter Puchala.  Detrimental effects of larval blow flies (Protocalliphora azurea) on nestlings and breeding success of Tree Sparrows (Passer montanus) , 2004 .

[4]  B. O. Wolf,et al.  MIGRATORY MOVEMENTS OF SHARP-SHINNED HAWKS (ACCIPITER STRIATUS) CAPTURED IN NEW MEXICO IN RELATION TO PREVALENCE, INTENSITY, AND BIOGEOGRAPHY OF AVIAN HEMATOZOA , 2004 .

[5]  J. Remple.  Intracellular Hematozoa of Raptors: A Review and Update , 2004 .

[6]  S. Griffey,et al.  Haemoproteus spp. and Leukocytozoon spp. in a Captive Raptor Population , 2004, Journal of wildlife diseases.

[7]  T. Iezhova,et al.  STANDARD SAMPLING TECHNIQUES UNDERESTIMATE PREVALENCE OF AVIAN HEMATOZOA IN WILLOW PTARMIGAN (LAGOPUS LAGOPUS) , 2003, Journal of wildlife diseases.

[8]  T. Whitworth.  A key to the puparia of 27 species of North American Protocalliphora hough (Diptera: Calliphoridae) from bird nests and two new puparial descriptions , 2003 .

[9]  R. K. Murphy,et al.  PREVALENCE OF TRICHOMONAS GALLINAE IN NESTLING COOPER'S HAWKS AMONG THREE NORTH AMERICAN POPULATIONS , 2002 .

[10]  G. Bortolotti,et al.  EFFECTS OF HEMATOZOAN PARASITES ON CONDITION AND RETURN RATES OF AMERICAN KESTRELS , 2000 .

[11]  W. Bowerman,et al.  Leucocytozoonosis in Nestling Bald Eagles in Michigan and Minnesota , 1999, Journal of wildlife diseases.

[12]  R. Poulin.  Body size vs abundance among parasite species: positive relationships? , 1999 .

[13]  M. Kuitunen,et al.  Species immigration, extinction and turnover of vascular plants in boreal lakes , 1999 .

[14]  R. W. Mannan,et al.  Hematology and hematozoa of adult and nestling Cooper's Hawks in Arizona , 1998 .

[15]  D. E. Andersen,et al.  Red-shouldered hawk broadcast surveys: Factors affecting detection of responses and population trends , 1998 .

[16]  R. W. Mannan,et al.  TRICHOMONIASIS IN COOPER'S HAWKS FROM ARIZONA , 1998, Journal of wildlife diseases.

[17]  E. Williams,et al.  Blackfly-Induced Mortality of Nestling Red-Tailed Hawks , 1998 .

[18]  T. Groothuis,et al.  The Relation Among Gonadal Steroids, Immunocompetence, Body Mass, And Behavior in Young Black‐Headed Gulls (Larus Ridibundus) , 1997, The American Naturalist.

[19]  R. Ashford,et al.  BLOOD PARASITES OF NESTLING GOSHAWKS , 1997 .

[20]  M. Heidenreich,et al.  Birds of prey : medicine and management , 1997 .

[21]  S. Merino,et al.  High Prevalence of Hematozoa in Nestlings of a Passefine Species, the Pied Flycatcher (Ficedula hypoleuca) , 1995 .

[22]  E. Korpimäki,et al.  Blood parasites, sexual selection and reproductive success of European kestrels , 1995 .

[23]  M. Thomas,et al.  A New Method for the Diagnosis of Trichomonas gallinae Infection by Culture , 1994, Journal of wildlife diseases.

[24]  R. Rosenfield,et al.  Avian hematozoa of adult and nestling Cooper's hawks (Accipiter cooperii) in Wisconsin , 1994 .

[25]  C. Atkinson,et al.  Pathogenicity and epizootiology of avian haematozoa: Plasmodium, Haemoproteus, and Leucocytozoon , 1991 .

[26]  I. Newton,et al.  Leucocytozoon toddi in British sparrowhawks Accipiter nisus: observations on the dynamics of infection , 1990 .

[27]  C. Sabrosky,et al.  Bird blow flies (Protocalliphora) in North America (Diptera:Calliphoridae), with notes on the Palearctic species , 1989 .

[28]  J. Cooper,et al.  TRICHOMONIASIS IN FREE-LIVING GOSHAWKS (ACCIPITER GENTILIS GENTILIS) FROM GREAT BRITAIN , 1988, Journal of wildlife diseases.

[29]  A. Fedynich,et al.  QUANTIFICATION OF HEMATOZOA IN BLOOD SMEARS , 1987, Journal of wildlife diseases.

[30]  M. Marquiss,et al.  Haematozoa of British birds. VII. Haematozoa of raptors in Scotland with a description of Haemoproteus nisi sp. nov. from the sparrowhawk (Accipiter nisus) , 1983 .

[31]  J. Bednarz,et al.  NEST-SITES AND HABITAT OF RED-SHOULDERED AND RED-TAILED HAWKS IN IOWA , 1982 .

[32]  J. Bednarz,et al.  Status, Habitat Use, and Management of Red-Shouldered Hawks in Iowa , 1981 .

[33]  E. Greiner,et al.  SOME INFECTIOUS AND PARASITIC DISEASES IN OKLAHOMA RAPTORS , 1977, Journal of wildlife diseases.

[34]  E. Greiner,et al.  Leucocytozoon (Haemosporida; Leucocytozoidae) of the falconiformes. , 1977, Canadian journal of zoology.

[35]  S. Desser,et al.  Anemia in Leucocytozoon simondi infections. I. Quantification of anemia, gametocytemia, and osmotic fragility of erythrocytes in naturally infected Pekin ducklings. , 1977, Canadian journal of zoology.

[36]  G. Bennett,et al.  Distribution of the avian hematozoa of North America. , 1975, Canadian journal of zoology.

[37]  G. Bennett.  Simple techniques for making avian blood smears , 1970 .

[38]  R. Kocan,et al.  Anemia in ducks infected with Leucocytozoon simondi. , 1966, The Journal of protozoology.

[39]  J. Craighead,et al.  Hawks, owls, and wildlife , 1956 .

[40]  R. Stabler.  Trichomonas gallinae:a review. , 1954, Experimental parasitology.

[41]  R. Stabler.  Further Studies on Trichomoniasis in Birds , 1941 .