ANAS. DUCK. 



Generic Character. 



Rostrum basi glabrum, de- 

 pressum, latum, ad api- 

 cem rectum, obtusum. 



Nares ovales, parvae. 



Cauda mediocris, rectricibus 

 aequalibus, basi plerumque 

 pennis recurvatisinstructis. 



Beak simple at the base, de- 

 pressed, broad, straight, 

 towards the tip, obtuse. 



Nostrils oval, small. 



Tail niediocral, its feathers 

 equal, the base often fur- 

 nished with recurved 

 plumes. 



ANAS Auctorura. 



JjUCKS may be distinguished from the two pre- 

 ceding genera of this stirps by the absence of the 

 fleshy protuberance on the base of the beak peculiar 

 to them : from the Shovelers, by the beak not being 

 expanded towards the tip ; from the Pintails and 

 Wigeons by the bluntness of the tail-feathers, and 

 from the Teals by the shape of their beak and their 

 larger size. 



