Fig. 4: Best model for phylogenetic path analysis.
From: Global incidence of female birdsong is predicted by territoriality and biparental care in songbirds
Arrows represent supported paths (associations) among predictor variables and female song incidence. The thickness of each arrow represents the strength of each association, determined by the correlation coefficient next to each arrow. Blue arrows represent positive correlations, and red arrows are negative correlations. Box colours match hypotheses from Fig. 1.
