Figure 3. Continental scale map showing spatial clustering hot spots of avian influenza virus M gene positive wild birds.

Z-score results from the Getis-Ord Gi* analyses: >1.65 = 90% significant, 1.66–1.96 = 90%–95% significant, 1.97–2.58 = 95%–99% significant, >2.58 = 99% significant.