Extended Data Fig. 2: Ancestral character estimation from results of discriminant analysis.
From: Enlargement of sternum traits facilitated the evolution of powered flight in birds
Ancestral character estimation of median probability of flight presence across the dinosaur-bird transition from the discriminant analysis based on relative sternum plate area using minimum body mass estimates (left) and maximum body mass estimates (right) (N = 28 fossil taxa). Darker colours indicate a likely presence of flight ability in the taxon, lighter colours indicate likely absence of flight ability. The extant portion of the tree was condensed into a single branch labelled ‘Neornithes’, setting the tip value at 0, which represents the relative value for the ancestor of the living bird crown group, Neornithes.
