. Males were more likely than females to follow their mother (permutation-based binomial model on data recording the number of times individual A followed individual B relative to the number of times A did not follow B, regression coefficient = 0.39, p < 0.001; Table S2; Figure 3A). There was no overall difference in the rate at which whales followed their mothers compared to non-mothers (regression coefficient = 0.86, p = 0.059; Table S2; Figure 3A), which may be because nonmothers included adult sisters and grandmothers, whom individuals are also likely to follow.