Prevalence and effects of West Nile virus on wild American kestrel (Falco sparverius) populations in Colorado

By: , and 
Edited by: Ellen Paul

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Abstract

To assess the potential impacts of West Nile virus (WNV) on a wild population of free-ranging raptors, we investigated the prevalence and effects of WNV on American Kestrels (Falco sparverius) breeding along the Front Range of the Rocky Mountains in northern Colorado. We monitored kestrel nesting activity at 131 nest boxes from March to August 2004. Of 81 nest attempts, we obtained samples from 111 adults and 250 young. We did not detect WNV in sera; however, 97.3% (108/111) of adults tested positive for WNV neutralizing antibodies, which possibly represented passive transfer of maternal antibodies. Clutch size, hatching, and fledging success in our study did not differ from that previously reported for this species, suggesting that previous WNV exposure in kestrels did not have an effect on reproductive parameters measured in the breeding populations we studied in 2004.

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Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Prevalence and effects of West Nile virus on wild American kestrel (Falco sparverius) populations in Colorado
DOI 10.1525/california/9780520272378.003.0004
Year Published 2012
Language English
Publisher University of California Press
Publisher location Berkeley, CA
Contributing office(s) National Wildlife Health Center
Description 10 p.
Larger Work Type Book
Larger Work Title Emerging avian disease
First page 45
Last page 54
Country United States
State Colorado
Online Only (Y/N) N
Additional Online Files (Y/N) N