AGRICULTURAL USES OF BIRDS. 



949 



HOODED MERGANSER (Lovhodytes cucullatus). 



WOOD, OR SUMMER-DUCK (Aix sponsa). 



AMERICAN SWAN ( Cygnus Amencanus). (Natatores. 



PTARMIGANS. 



MALLARD DUCK (Anas boschas). 



EIDER-DUCK (Samateria mollissima). 



SNOWY HERON (Garzetta candidissi- 

 ma.) (Grallatores.) 



WILD GOOSE (A. canadends). 



