Movie S1.

Video illustrating temporal and spatial spread across Eurasia of seven main H5 reassortant viruses from deduced site of origin. The video is based on the dataset (i) (Table S1). Reassortment clades (or subtype) were mapped for segments 1, 2, 3, 5, and 6 (segments 7 and 8 stayed the same) onto the tree of segment 4 independently, using discrete traits (asymmetric BSSVS [Bayesian Stochastic Search Variable Selection]). Subsequently, the full code was reconstructed at the nodes.