Segregation in feeding behaviour of four diving ducks in southern Manitoba

摘要: The canvasback, Aythya valisinaria; redhead, A. americana; scaup, affinis; and ruddy duck, Oxyura jamaicensis, are sympatric on the small wetlands of Canadian prairie region. four species did not occur randomly each tended to by itself more often than with any other species. Each forage in a particular part pond. Selection for different foraging sites appears be important segregating those whose diets overlap most.