Data from: The maintenance of phenotypic divergence through sexual selection: an experimental study in barn swallows Hirundo rustica

Rebecca Safran, Yoni Vortman, Brittany R. Jenkins, Joanna K. Hubbard, Matthew R. Wilkins, Rachel J. Bradley & Arnon Lotem
Previous studies have shown that sexual signals can rapidly diverge among closely related species. However, we lack experimental studies to demonstrate that differences in trait-associated reproductive performance maintain sexual trait differences between closely related populations, in support for a role of sexual selection in speciation. Populations of Northern Hemisphere distributed barn swallows Hirundo rustica are closely related, yet differ in two plumage-based traits: ventral color and length of the outermost tail feathers (streamers). Here we...
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