r/t:-l.'.;r,,f,i I'y the Loiii-Uiy oj jonii U i 



Wild ducks in Texas, showing opportunities for protection 



I'lwto^tttfli by the Courtesy of yohn Htyno.d 



Swans in winter on Heywood Estate, Gardner, Massachusetts, showing how 

 waterfowl keep open a hole in the ice 



