Fig. 5

Linear relationship between the frequency of departures in given migration directions and the seasonal frequencies of winds. The data, which is presented in Additional file 1: Table S8, includes the number of flamingos that departed toward a certain angular direction slot (n = 32) and the number of times (at two-hour intervals) that wind blew at a certain angular direction for each colony over the season. Both bird and wind directions were categorised based on 6 direction classes, each consisting of 60°, and the frequency of seasonal winds were calculated from the day of the first flamingo departure to the last one for each colony. A positive relationship between bird departures and wind frequency suggests a potential influence of seasonal winds on birds’ destination