Fig. 2From: Macroevolutionary bursts and constraints generate a rainbow in a clade of tropical birdsPhylogenetic variance-covariance matrix across all 35 patches shows that patch color in discrete morphological regions covary. Darker blue colors represent stronger positive covariance while darker red colors represent stronger negative covariance. Boxes represent hierarchical clusters, estimated using the built-in hclust method in corrplotBack to article page