6 April 2022 Novel nest tree selection by a deciduous forest New World warbler
Alexander Sharp, Brandon Connare, Kamal Islam
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The Cerulean Warbler (Setophaga cerulea), a Neotropical migrant passerine, inhabits deciduous forests across the eastern and midwestern United States and Canada. Within this broad geographic distribution, Cerulean Warbler populations select specific tree species for nest placement and are known to use a variety of deciduous tree species depending on the population. In southern Indiana, Cerulean Warblers typically nest in white oak (Quercus alba), but we have documented 19 tree species used, all of which are deciduous species. During 2018 and 2019, we discovered 2 instances of Cerulean Warblers nesting in pine trees (Pinaceae) in southern Indiana. Our observations suggest that Cerulean Warblers may in some instances select atypical nest sites as long as specific microhabitat characteristics are present at the nest location.

Alexander Sharp, Brandon Connare, and Kamal Islam "Novel nest tree selection by a deciduous forest New World warbler," The Wilson Journal of Ornithology 133(4), 640-645, (6 April 2022). https://doi.org/10.1676/20-0016
Received: 4 February 2020; Accepted: 1 October 2021; Published: 6 April 2022
Cerulean Warbler
nest substrate
Pinus strobus
Setophaga cerulea
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