Assistant Professor of Biology
Publication TagsGenes Genomics Genome Color Songbirds Plumage Phenotype Birds Mutation Pigmentation Carotenoids Introgression Gene Flow Polymorphism History Nucleotides Pollen Phylogeny Breeding Diet Feathers Chromosomes Hybridization Mitochondrial Dna Reproductive Isolation
Most Recent Publications
Leonardo Campagna, David P.L. Toews, 2022, Current Biology on p. R1173-R1186
Genomic variation in the Black-throated Green Warbler (Setophaga virens) suggests divergence in a disjunct Atlantic Coastal Plain population (S. v. waynei)
John Carpenter, Alexander Worm, Than Boves, Andrew Wood, Joseph Poston, Toews, David P. L., 2022, Ornithology
Genetic confirmation of a hybrid between two highly divergent cardinalid species: A rose-breasted grosbeak (Pheucticus ludovicianus) and a scarlet tanager (Piranga olivacea)
David P.L. Toews, Tessa A. Rhinehart, Robert Mulvihill, Spencer Galen, Stephen M. Gosser, Tom Johnson, Jessie L. Williamson, Andrew W. Wood, Steven C. Latta, 2022, Ecology and Evolution
Brandon Hoenig, Allison Snider, Anna Forsman, Keith Hobson, Steven Latta, Eliot Miller, Michael Polito, Luke Powell, Samantha Rogers, Thomas Sherry, Toews, David P. L., Andreanna Welch, Sabrina Taylor, Brady Porter, 2022, Ornithology
Gut microbiome composition better reflects host phylogeny than diet diversity in breeding wood-warblers
Marcella D. Baiz, Andrea Benavides C., Eliot T. Miller, Andrew W. Wood, David P.L. Toews, 2022, Molecular Ecology
Molecular assays of pollen use consistently reflect pollinator visitation patterns in a system of flowering plants
Aubrie R.M. James, Monica A. Geber, David P.L. Toews, 2022, Molecular Ecology Notes on p. 361-374
Silu Wang, Madelyn J. Ore, Else K. Mikkelsen, Julie Lee-Yaw, David P.L. Toews, Sievert Rohwer, Darren Irwin, 2021, Nature Communications
Rare hybrid solves “genetic problem” of linked plumage traits
Marcella D. Baiz, Andrew W. Wood, David P.L. Toews, 2021, Ecology
Extensive historical and contemporary hybridization suggests premating isolation in Vermivora warblers is not strong: A reply to Confer et al.
David P.L. Toews, Marcella D. Baiz, Gunnar R. Kramer, Irby J. Lovette, Henry M. Streby, Scott A. Taylor, 2021, Ecology and Evolution on p. 10720-10723
Pigmentation Genes Show Evidence of Repeated Divergence and Multiple Bouts of Introgression in Setophaga Warblers
Marcella D. Baiz, Andrew W. Wood, Alan Brelsford, Irby J. Lovette, David P.L. Toews, 2021, Current Biology on p. 643-649.e3
David P.L. Toews, Scott A. Taylor, Rachel Vallender, Alan Brelsford, Bronwyn G. Butcher, Philipp W. Messer, Irby J. Lovette, 2016, Current Biology on p. 2313-2318
The Evolution and Genetics of Carotenoid Processing in Animals
David P.L. Toews, Natalie R. Hofmeister, Scott A. Taylor, 2017, Trends in Genetics on p. 171-182
Migration, mitochondria, and the yellow-rumped warbler
David P.L. Toews, Milica Mandic, Jeffrey G. Richards, Darren E. Irwin, 2014, Evolution; international journal of organic evolution on p. 241-255
Kira E. Delmore, David P.L. Toews, Ryan R. Germain, Gregory L. Owens, Darren E. Irwin, 2016, Current Biology on p. 2167-2173
David P.L. Toews, Leonardo Campagna, Scott A. Taylor, Christopher N. Balakrishnan, Daniel T. Baldassarre, Petra E. Deane-Coe, Michael G. Harvey, Daniel M. Hooper, Darren E. Irwin, Caroline D. Judy, Nicholas A. Mason, John E. McCormack, Kevin G. McCracken, Carl H. Oliveros, Rebecca J. Safran, Elizabeth S.C. Scordato, Katherine Faust Stryjewski, Anna Tigano, J. Albert C. Uy, Benjamin M. Winger, 2015, Ornithology on p. 13-30
A comparison of genomic islands of differentiation across three young avian species pairs
Darren E. Irwin, Borja Milá, David P.L. Toews, Alan Brelsford, Haley L. Kenyon, Alison N. Porter, Christine Grossen, Kira E. Delmore, Miguel Alcaide, Jessica H. Irwin, 2018, Molecular Ecology on p. 4839-4855
Alan Brelsford, David P.L. Toews, Darren E. Irwin, 2017, Proceedings of the Royal Society B: Biological Sciences on p. 20171106
Kang Wook Kim, Benjamin C. Jackson, Hanyuan Zhang, David P.L. Toews, Scott A. Taylor, Emma I. Greig, Irby J. Lovette, Mengning M. Liu, Angus Davison, Simon C. Griffith, Kai Zeng, Terry Burke, 2019, Nature Communications on p. 1852
David P.L. Toews, Scott A. Taylor, Henry M. Streby, Gunnar R. Kramer, Irby J. Lovette, 2019, Proceedings of the National Academy of Sciences of the United States of America on p. 18272-18274
David P.L. Toews, Alan Brelsford, Christine Grossen, Borja Milá, Darren E. Irwin, 2016, Ornithology on p. 698-717
News Articles Featuring David Toews
Nov 21, 2022
What shapes the composition of microbes in a warbler’s gut?
Differences among the collection of bacteria and other microorganisms that live within birds’ digestive tracts — their gut microbiomes — are not primarily driven by diet diversity, contrary to a recently proposed hypothesis.
Oct 10, 2022
Researchers confirm a western Pa. birdwatcher's discovery: a new songbird hybrid
Penn State researchers have identified a rare hybrid of two western Pennsylvania songbirds. The bird is a combination of the rose-breasted grosbeak and brightly-colored scarlet tanager. Stephen Gosser—a self-described “diehard birder”— spotted it in Lawrence County, along the Commonwealth’s western edge, in June 2020.
Oct 10, 2022
A rare hybrid bird found in western Pennsylvania
A pairing 10 million years in the making was discovered in the woods of western Pennsylvania. Researchers from Penn State University documented the first-ever hybrid of a rose-breasted grosbeak and scarlet tanager.
Oct 05, 2022
Birdsong reveals rare hybrid coupling 10 million years in the making
A team of researchers led by Penn State was able to use a combination of genomic sequencing and song analysis to identify a rare hybrid bird whose ancestors haven’t shared the same breeding location or lineage for 10 million years.
Oct 05, 2022
Mysterious Bird Is the First-Ever Documented Hybrid of Its Kind
Here's a beautiful story for anyone who appreciates birds. A female rose-breasted grosbeak got together with a male scarlet tanager despite the bird species' preferences for dwelling in different habitats. Their offspring, a male, has now made ornithology history as the first-ever documented hybrid of its kind.
Aug 10, 2022
Never-before-seen colorful bird hybrid surprises scientists
A birder named Stephen Gosser recently took a stroll through the woods in Lawrence County, Pennsylvania, when he heard what he thought was a scarlet tanager.
Jan 24, 2022
Penn State biologists explore the secrets of the warbler genome
Looking through binoculars at the trees in their backyards during the pandemic, many brand-new birders may have been surprised by the diversity of visitors stopping by — finches, jays and warblers in an astounding array of yellows, blues and reds.
Jun 28, 2021
Weird warbler reveals genetics of its mismatched colors
An incredibly rare hybrid warbler with mismatched color patterns has allowed researchers to disentangle the genetic drivers of two traits that usually come as a package deal — the black face mask and the black throat patch in blue-winged and golden-winged warblers.
Nov 30, 2020
Warbler coloration shaped by evolution via distinct paths
Two genes that are important for the diverse colors and patterns of warbler plumage have evolved through two very different processes, according to a new study led by Penn State researchers. These evolutionary processes could help explain the rapid evolution of these songbirds into so many unique species.
Sep 01, 2020
The Gene that Makes Female Birds Drab
In some finch species, the difference between colorful males and muted females comes down to one gene, BCO2, which encodes an enzyme that degrades carotenoids.