Figure 1. Phylogenetic distribution of nest types and association with range size across 3174 species of songbirds. Tips represent families in most cases, except when there is more than one nest type per family, in which case the tip is divided. Pictures from iStockphoto.com, except for Hypothymis azurea and Ploceus manyar , taken by Damien Esquerré. Figure prepared using
R package ggtree (Yu et al. 2017).