Fig. 2.

Maximum-clade-credibility tree depicting the inferred ancestry of 65 full-length sequences for H7 hemagglutinin gene segments derived from influenza A viruses isolated from wild and domestic birds in North America. Posterior probability values ≥0.7 are reported. Grey bars indicate the 95 % HPD for the time of the most recent common ancestors. Sequences determined this study are indicated in bold. The branch tip for A/pheasant/New Jersey/26996–2/014 (H7N3) is colored red