CONTEXTS. 



Page 



Genus Chen 117 



Chen albatus. Cassin'a Snow Goose 117 



Genus Bkrnicla 117 



Bernicla brenta. Brent Goose 117 



Bernicla leucopsis. Barnacle (ioose 118 



Bernicla canadensis. Canada Goose 118 



Bernicla ruficoUis. Red-breasted Goose 119 



Genus Cygntjs 119 



C,yguus olor. Mvite Swan 119 



Oygnus immutabilis. Polish Swan 120 



Cyguus musicus. Whooper Swan 120 



Cygiius americanus. American Swan 120 



Cyrpms buccinator. Trumpeter Swan 121 



Cjrgnus bewiclii. Bewick's Swan 121 



Oemm Caibina 121 



Cairina mosc/uita. Muscdvy Duck 121 



Genua Tadohxa 123 



Tadorna cornuta. Common Sheldrake 122 



Tadorna casarca. Ruddy Sheldrake 122 



Genm ^Ex 123 



Aix spunsa. Slimmer Duck 123 



Genus Marec.v 123 



INIareca penelope. Wi.ueon 123 



Mareca americana. American AMgeon 124 



Genus Bafila 124 



Dafila acuta. Pintail 124 



Genus Anas 125 



Anas boscas. Wild Duck 125 



Genus Chai'LELasmus 125 



Chaulelasmus streperus. Gadwall 125 



Genus Queequedula 120 



Querquedula circia. Garganey 126 



Querquedida discors. Blue-winged Teal 126 



Querquedula crecca. Common Teal 127 



Querquedula bimacidafu. Bimaculated Duck ]27 



Querquedula carolinensis. American Green-winged 

 Teal 127 



Genus Spatula j28 



Spatula clypeata. Shoveller ]28 



