Data from: Phenotypic differentiation is associated with divergent sexual selection among closely related barn swallow populations

Matthew R. Wilkins, Hakan Karaardıç, Yoni Vortman, Thomas L. Parchman, Tomáš Albrecht, Adéla Petrželková, Leyla Özkan, Peter L. Pap, Joanna K. Hubbard, Amanda K. Hund & Rebecca J. Safran
Sexual selection plays a key role in the diversification of numerous animal clades and may accelerate trait divergence during speciation. However, much of our understanding of this process comes from phylogenetic comparative studies, which rely on surrogate measures such as dimorphism that may not represent selection in wild populations. In this study, we assess sexual selection pressures for multiple male visual signals across four barn swallow (Hirundo rustica) populations. Our sample encompassed 2400 linear km...
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