Variation of West Nile virus antibody prevalence in migrating and wintering hawks in Central California

Joshua Hull, Angus Hull, William Reisen, Ying Fang, Holly B Ernest

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


To assess the extent of West Nile virus (WNV) exposure of migrating (Marin Headlands) and wintering (Central Valley) hawks in California, plasma from 271 Red-tailed Hawks (Buteo jamaicensis), 19 Red-shouldered Hawks (B. lineatus), and 30 Cooper's Hawks (Accipiter cooperii) was tested for WNV antibodies during the winter of 2004-2005. WNV antibodies were found in 5% of migrating and 15% of wintering Red-tailed Hawks, 20% of migrating and 58% of wintering Red-shouldered Hawks, and 13% of migrating Cooper's Hawks. No individuals demonstrated visible signs of WNV illness. Red-tailed Hawks that tested positive for WNV antibodies displayed no difference from Red-tailed Hawks without WNV antibodies in weight to wing chord ratio or white blood cell counts. In the Central Valley, WNV antibodies were significantly more prevalent in Red-shouldered Hawks than in Red-tailed Hawks. Significantly more Red-tailed Hawks sampled on wintering grounds tested positive for WNV antibodies than Red-tailed Hawks sampled during migration.

Original languageEnglish (US)
Pages (from-to)435-439
Number of pages5
Issue number2
StatePublished - May 2006


  • Antibody
  • Arbovirus
  • Flavivirus
  • Hematology
  • Raptor
  • Red-tailed Hawk
  • West Nile virus

ASJC Scopus subject areas

  • Animal Science and Zoology


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