Fig. 3

Time-scaled maximum clade credibility phylogenetic tree of concatenated eight gene segments of avian influenza viruses. Node bars in blue represent 95% Bayesian credible intervals (posterior probability > 0.5). The horizontal axis defines the time scale in decimal years. The taxa of H5N1 HPAI from sea lions in Brazil are indicated in red. The ancestral node of suspected emergence of the amino acid substitutions are labelled using black arrow