Use of molecular methods, such as paternity analysis, has revolutionized our understanding of the evolution of sexually selected traits in socially monogamous species. Yet, we are only beginning to understand the evolution of multiple sexually selected traits, especially multimodal traits, such as plumage color and bird song. I plan to examine how the redundant signals and multiple messages hypotheses explain the evolution of multiple color and song traits in chestnut-sided warblers (Dendroica pensylvanica). I hope to use funds from the ABS student research grant to complete a paternity analysis, which will reveal levels of extra-pair reproductive success among male chestnut-sided warblers, allowing me test whether color and song traits function as redundant signals or multiple messages.