The migratory birds are central to the epidemiology of many diseases like West Nile virus (WNV), Avian flu, Lyme disease and Salmonellosis. They carry these pathogens with them, either as a reservoir host or by dispersing infected arthropod vectors. Birds contribute to the global spread of emerging infectious diseases in a manner analogous to humans travelling on aircraft. Over the last two decades this problem becomes the main concern for many experimental and theoretical biologists. But still now little effort has been made to study the epidemics caused by the migratory birds using...