Figure 1.
Map of the study area including satellite transmitter-marked whooper swan migratory routes.
Figure 2.
Poultry density and H5N1 outbreak locations [circles (poultry), diamonds (migratory waterbirds), and triangles (wild non-waterbirds)] in eastern Asia (2003–2007).
Table 1.
Satellite transmitter performance summary.
Table 2.
Migration chronology and transmission history summary.
Figure 3.
Whooper swan movements (2006–2007) and proximity to HPAI outbreak locations (2003–2007) affecting poultry (circles) and wild non-waterbirds (triangles) in (a) northeastern China and (b) the Korea Peninsula.
Table 3.
Long distance migration movements recorded for whooper swans during fall 2006 and spring 2007.
Figure 4.
Frequency of poultry and wild bird H5N1 outbreak events in relation to season as determined by whooper swan annual cycle stage.
Circles, squares, diamonds, and triangles represent the expected number of outbreaks in each of bird sector, bars represent the actual number of outbreaks, and arrows up/down indicate if there were greater than or less than expected numbers of outbreaks, respectively.
Table 4.
Mean weekly exposure of whooper swans to poultry by annual cycle stage.
Figure 5.
Relationships among migratory whooper swan movements, the timing of H5N1 outbreaks, and the density of poultry in eastern Asia.
Solid line represents mean poultry density at whooper swan locations through the annual cycle. Circles (poultry), diamonds (migratory waterbirds), and triangles (wild non-waterbirds) indicate the timing and underlying poultry density at each H5N1 outbreak event.