Fig. 4. Movements of banded Great (Ardea alba) (orange arrows), Intermediate (Ardea intermedia) (green arrows), and Little (Egretta garzetta) (blue arrows) Egret in Australasia in relation to epizootics (red dots) and human cases (+) of HPAI. Wallace’s Line (solid line). Source: Geering et al. 1998, OIE 2006, Wetlands International 2006, FAO 2007, WHO 2008a,b.