, Xiangming Xiao†, Joseph Domenech‡, Juan Lubroth‡, Vincent Martin‡, and Jan Slingenbergh‡
Figure 1. Map showing the spread of highly pathogenic avian influenza (HPAI) H5N1 virus and its environmental context. The background color indicates the month when the first frost was observed, from July through December 2005. The distribution of the main wetlands is indicated (dark blue; west Siberian lowland [WSL]). The reported presence of HPAI H5N1 virus from July 2005 to January 16, 2006, is indicated by squares with color coding for the first report of HPAI H5N1 virus in the country, and by green dots for other records.