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Age determination of free-living male black-throated blue warblers during the breeding season

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dc.contributor.author Graves, Gary R. en
dc.date.accessioned 2010-02-24T19:46:44Z
dc.date.available 2010-02-24T19:46:44Z
dc.date.issued 1997
dc.identifier.citation Graves, Gary R. 1997. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F8678">Age determination of free-living male black-throated blue warblers during the breeding season</a>." <em>Journal of Field Ornithology</em>. 68 (3):443&ndash;449. en
dc.identifier.issn 0273-8570
dc.identifier.uri http://hdl.handle.net/10088/8678
dc.description.abstract Male Black-throated Blue Warblers (Dendroica caerulescens) can be aged as yearlings (SY) or older (ASY) during the breeding season using binoculars. Significant differences in wing color of SY and ASY males, as revealed be spectrophotometric analysis of museum specimens, are apparent in free-living birds. Error rates in age determination in five held trials averaged 3.1% for ASY males and 0% for SY males (though sample sizes were small for yearlings). Age data from multiple investigators should not be combined for analysis unless individual error rates can be estimated. The statistical effects of error are especially critical when age ratios are calculated for small samples (n &lt; 25). en
dc.relation.ispartof Journal of Field Ornithology en
dc.title Age determination of free-living male black-throated blue warblers during the breeding season en
dc.type Journal Article en
dc.identifier.srbnumber 75014
rft.jtitle Journal of Field Ornithology
rft.volume 68
rft.issue 3
rft.spage 443
rft.epage 449
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Vertebrate Zoology en
dc.citation.spage 443
dc.citation.epage 449


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