Fig. 5From: Identifying key bird species and geographical hotspots of avian influenza A (H7N9) virus in ChinaThe geographic distribution of identified bird species with positive lags Lag ≤ 5 in China. The size of the nodes in blue represents the total number of observed bird species. The coloured surface represents the density magnitude of bird species after smoothing. The map is generated using ArcGIS v.10.5Back to article page