Fig. 4

Wigeon arrival timing relative to the \(\mathbf{TGS }_{\mathrm{onset}}\) Here we show the interaction effect between maximum longitude and distance traveled on \(\Delta {\text{arrival}}_{\mathrm{d}}\), specifically the effect of maximum longitude for three different values of distance traveled. The lines show the estimate for the effect at the given distance, and the shaded areas reflect the 95% confidence intervals for the estimate. The data used to fit the model are shown as scatterplot. Vertical lines and labels provide reference longitudes for locations along the migration corridor of tracked wigeons