Multivariate functions for fossils' estimations from Aerodynamic modelling of a Cretaceous bird reveals thermal soaring capabilities during early avian evolution

OLS multiple regressions used to estimate the body mass (BM), wingspan (B), and lift surface (SL) of the specimens of Sapeornis chaoyangensis used in the present study. Variable Y is the variable estimated and variables X are the anatomical measurements taken from refs. 13 and 47. %MPE indicates the prediction error of the equation over the full sample of modern birds.