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).