Figure 1.

Extant distribution of living ratites and the Holocene distribution of moa and elephant birds. Each color relates the ratite groups to their area of origin. Kiwi birds, which range from 10–100 kg, are printed in gray color. Silhouettes of birds and eggs indicate a relative proportion of actual size. RSSD or SSD is implied by marking sex symbols on two different silhouettes within a species. For species without significant RSSD or SSD, there is only one silhouette. See Supplementary Materials Dataset Table S1 for details on the source of bird images.