Fig. 2From: Song divergence indicates an unclear relationship between the Neotropical and Nearctic Horned LarksDifferences in the acoustic traits among the Nearctic and Neotropical Horned Larks. We showed a boxplot of each variable evaluated in: a the analysis using all retrieved songs, and b the analysis using one song per recording.*ā=āpā<ā0.05; **ā=āpā<ā0.005; ***ā=āpā<ā0.001Back to article page