Who we study:
Golden-winged warblers
Golden-winged warblers are much-loved Neotropical migrants that breed in scrubby secondary growth habitats in eastern North America, from the higher elevations in the Appalachians to Manitoba. Their buzzy songs and striking plumage make them one of the more sought after North American wood warblers by birders. Unfortunately, populations of the golden-winged warbler have experienced significant declines in recent decades, likely due to habitat loss on their wintering grounds in Central and South America.
Blue-winged warblers
Blue-winged warblers are also Neotropical migrants that breed in similar habitats to golden-winged warblers, scrubby secondary growth. Their similar ecology and behavior led John James Audubon to wonder if blue-wined and golden winged warblers were the same species, even though they have such different plumage. Our recent research has made the question posed by Audubon particularly interesting.
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What we study:
Our collaborative work on warblers is primarily led by Dr. David Toews and his group at Pennsylvania State University as a part of their research on the diversification in the New World wood warblers. This group of birds 鈥� beloved by scientists and birders alike 鈥� has been a generous source of insights into hard-to-answer questions and cutting-edge studies for centuries. Hybridization is commonly observed between a number of warbler species and, while this does not make it easier to identify different species in the field, it opens up many opportunities to study the nature of population boundaries and search for genes that underly them.
Golden-winged and blue-winged warblers are closely related birds and they hybridize extensively where their breeding ranges overlap. By sequencing whole genomes from multiple individuals our research has shown that they have a long evolutionary history of hybridization. This long history of hybridization is like a crossing experiment performed in the lab (think Mendel鈥檚 peas), but happening in nature! We have taken advantage of this natural admixture experiment to identify genes that underlie plumage differences as well as differences in migration within the Vermivora genus and we continue to collaborate on this work with multiple labs.
In the Press
鈥� Discovery: Rare three-species hybrid warbler鈥�
Plumage genes and little else distinguish the genomes of hybridizing warblers.
Warbler genomes look to be 99.97 percent alike鈥�
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Blue-winged, golden-winged warblers not all that different鈥�
Golden-Winged And Blue-Winged Warblers Are 99.97 Percent Alike Genetically鈥�
Warbler genomes look to be 99.97 percent alike鈥�
A Lump And A Split And The List Is Shredded?
Colorado Arts and Sciences Magazine Declining warblers making the best of bad situation:听The discovery of a rare three-species warbler hybrid suggests bird species in sharp decline are struggling to find suitable mates
Warbler genomes look to be 99.97 percent alike鈥�
Golden-winged Warbler and Blue-winged Warbler are remarkably similar
Blue-winged, golden-winged warblers not all that different鈥�
Publications
2021
Toews DPL, Bai MD, Kramer GR, Lovette IJ, Streby H, Taylor SA.听Accepted. Extensive historical and contemporary hybridization suggests pre-mating isolation in听Vermivora听warblers is not strong: a reply to Confer et al.听Ecology and Evolution.
2020
Baiz MD, Kramer GR, Streby HM, Taylor SA, Lovette IJ, Toews DPL. 2020. Genomic and plumage variation in听Vermivora听hybrids.听The Auk: Ornithological Advances.听137:
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2019
Toews DPL, Taylor SA, Streby H, Kramer G, Lovette IJ. 2019.听Selection on VPS13A linked to migration听in a songbird.听Proceedings of the National Academy of Sciences.听116:听18272-18274
Toews DPL, Streby H, Burket L, Taylor SA. 2018. A wood-warbler produced through both interspecific and intergeneric hybridization. Biology Letters听14:听20180557.听
2016
+Toews DPL,听+Taylor SA, Vallender R, Brelsford A, Butcher BG, Messer PW, Lovette IJ.听2016. Plumage genes and little else distinguish the genomes of hybridizing warblers.听Current Biology 26: 2313-2318鈥�.听+Authors contributed equally. Recommended by PDF