DUSKY DUCK. 



brown, with black streaks: there are no zigzag stripes 

 on the sides : the rump and the lower tail-coverts are 

 greyish. 



In the male the inferior larynx is dilated a little 

 before, and forms, on the left side, a bony protu- 

 berance of a similar form with that of the Wild Duck, 

 but smaller : the rings of which the tracheal tube is 

 composed are narrower than in that bird, but towards 

 the base of the trachea they become broader, and 

 then resume a smaller diameter at a little distance from 

 the inferior hirynx. 



The Gadwall inhabits the northern parts of the 

 globe, visiting this country in the winter, though 

 sparingly: according to Temminck it is very abundant 

 in Holland, and breeds in the marshes and among 

 rushes, laying eight or nine ashy-green eggs : it feeds 

 in the night, concealing itself among the reeds and 

 rushes during the day. It flies with great rapidity, 

 and utters a note riot unlike that of the Mallard, but 

 louder. 



DUSKY DUCK. 



(Anas ubscura ) 



, collos striis longitudinalibus ob curis, specnlo alarum 

 cccruleo nigro marginato, reciricibus albo marginatis. 

 Brown Duck with obscure longitudinal stripes on the neck, the 

 speculum of the wings blue, edged with black, the tail-feathers 

 edged with white. 



