Fig. 2.

Bayesian time-resolved phylogenetic trees for gene segments 5 to 8 of H5NX HPAI viruses sampled between May 2016 and July 2017 and for which whole genomes were sequenced. For segment 6, there are separate phylogenetic trees for subtypes N8 and N5. Distinct clades (groups) in the trees are given different colored branches. The number of distinct groups differs per gene segment: five for segment 5, two for segment 6, and one for segments 7 and 8. Furthermore, all eight segments of each virus are represented as eight parallel bars at the tips of each tree, with the colors in each segment’s bar corresponding to the branches of the individual gene sequences to indicate reassortment. The final bar represents the geographic locations of the sequences in the tree.