Raw data and R code for plotting

Data and R code to produce figure 2, which gives (a) Percent righting (N=26 birds, number of drops as indicated) and (b) righting mode (N=26 birds, number of successful rightings as indicated), and (c) vertical force production (N=5 birds, except for N=1 at 14 dph; data represent mean ± 1 s.d.) versus age in Chukar Partridge. Righting via roll, as accomplished by asymmetric wing and leg movements, is used prior to 14 dph. Around 9 dph, birds switch to righting via pitch using symmetric wing motions, and vertical force production increases concomitantly.