Parameters and leadership consistency of flights in the two compared datasets.

Leadership consistency can be evaluated from the repeatability of pairwise scores (R) computed for multiple contiguous segments (2.5 min long) of the same flight. P-values and confidence intervals for R were generated by randomization (1000 permutations) following Schielzeth and Nakagawa [18]. Unresolved relationships correspond to relationships with null pairwise score. Flock size excludes birds that split from the flock during the homing flight; the number of birds released is presented between brackets.