Fig. 4

Repeatability in realised migration routes across latitudes in autumn and spring. Estimates (dots) and 95% confidence interval (horizontal lines) show the degree of repeatability at each latitude, indicating statistically significant repeatability if lines do not reach zero. Repeatability values that are consistently above 0.5 and with limited variation across latitudes indicates that most of the longitudinal variation is due to between-individual variation in tracks. i = Baltic Sea, ii = The Alps, iii = Mediterranean Sea, iv = Sahara Desert, v = Tropical rainforest