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Re-evaluating Bay-breasted Warbler breeding range: Nine-years presence in Lower Michigan

Kevin Ellison·Paul W. Sykes·Carol I. Bocetti
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Abstract

he breeding range of the Bay-breasted Warbler ( Dendroica castanea ) is thought to include only the northernmost portions of six northeastern and northcentral states in the United States. During a 10-year banding study of Kirtland's Warblers ( Dendroica kirtlandii ) in northern Lower Michigan, we caught 44 Bay-breasted Warblers outside of their reported migration dates during 9 of the 10 years. Two birds captured in 1997 were in breeding condition; one possessed a cloacal protuberance and the other a full brood patch. We also captured two hatching year birds with fleshy rictal flanges in 1997. We suggest that these records indicate a long term presence of Bay-breasted Warblers on breeding grounds considerably farther south than previously recorded.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 44.15068115978094° to 45.259422036351694° latitude; -84.814453125° to -83.29833984375° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Kevin Ellison, Paul W. Sykes, Carol I. Bocetti. 2002. Re-evaluating Bay-breasted Warbler breeding range: Nine-years presence in Lower Michigan. https://doi.org/10.1676/0043-5643(2002)114%5B0415%3Aretbbw%5D2.0.co%3B2

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