Figure 1

Study area in the Poyang Lake wetland of Jiangxi province showing (a) map of China, (b) migratory path of herons along Poyang Lake wetland and Hong Kong and (c) false color display of imagery presenting Tianxiang Park and four nearby live bird markets.
The maps and the imagery are generated by the software ArcGIS10 (Esri, Redlands, CA, USA). Forests and green vegetation are shown in red, lakes and rivers are shown in black, while urban area is shown in greyish tone and transportation and roads are shown in lighter gray tone. Tianxiang Park is located in an urban agglomerate, which is densely populated.