Extended Data Fig. 2: Patterns of survival in groups.
From: Group formation and the evolutionary pathway to complex sociality in birds
(a) The change in survival in relation to group size (Zr) in family and non-family groups. (b) The relationship between the change in survival in relation to group size (Zr) and how maternal care changes with group size (Zr). In larger family groups (blue dots) survival increases and maternal care decreases. Dots represent raw data for individual species and parameter estimates are the back transformed posterior mode and 95% CI estimated using BPMMs.
