Wintering behaviors of Black Necked Cranes( Grus nigricollis) can be put into 7 categories:foraging,maintenance,agonistic,alert,locomotion,interspecific relation and territoriality With the progress of winter,food resources decreased This correlated with a change in foraging behavior of young cranes from begging to grabbing food from their parents Some crane families established territories,presumably to guard their food sources Size the territory,determined by the male or the stronger parent,changed...