No. 23. 



Grlaucionetta clangula americana. 



Adult male. Head and upper neck black (or of very deep 

 tone) ; richly glossed with green ; a roundish spot of white be- 

 tween bill and eye. Eemainder of neck, with lower parts of 

 body, pure white excepting a few brownish gray mottlings 

 about vent and sides of belly. Back, wings, and tail practi- 



No. 23. Adult Male. 



cally black (here and there blackish-brown), with white mark- 

 ings as shown or sufficiently indicated in picture. Bill black or 

 nearly so ; eyes bright yellow ; legs and toes yellow or orange, 

 with dusky webs. 



Female. Considerably smaller than male ; head plain brown ; 

 neck m front and at sides white faintly touched with gray ; be- 



