QUEBQUEDnLA 225 



Genus QUERQUEDULA. 



The distinctive feature of the genus Querquechda is the bright 

 bkte-grey colour of the wing-coverts, which, in two species, discors 

 and cyanoptera, are a bright smalt-blue. The common teal (Nettion 

 crecca) used to be placed in this genus ; but Nettion differs from 

 Querquedula in the shape of the bill, which is equal in breadth 

 throughout its length, whereas in the latter it is slightly broader at 

 the tip, and also has the nail somewhat larger in proportion. 



The internal structure is also different, the labyrinth of the 

 trachea being differently formed, being enlarged on both sides 

 downwards in Querquedula, but on one side only and upwards in 

 Nettion. 



There are five species, of which four are confined to America, 

 the fifth alone visiting India in winter. All five are birds of much 

 the same size. 



(35) QUERQUEDULA QUERQUEDULA. 



THE GAEGANEY, OR BLUE-WING TEAL. 



Anas querquedula, Ltnn. S. N. x. glI. i, p. 126 (175S) (Sweden); 



Hartert, Voij. Pal p. 1318 (1920). 

 Anas circia, Lcage, B. of C. p. 1080. 



Querquedula circia, Jenlon, B. of I. iii, p. 807; Hiimc, Nests and Eggs, 

 p. 644 ; Hume, S. F. i, p. 262 ; Adam, ibid. p. 402; Hume, ibid, iii, 

 p. 193 ; Le Mes. ibid. p. 382 ; Butler, ibid, iv, p. 30 ; Scully, ibtd. 

 p. 201 ; Butler, ibid, v, p. 234 ; Hume d- Davis, ibid, vi, p. 489 ; 

 Butler, ibid, vii, p. 188; Ball, ibid. p. 232; Cripiis, ibid. p. 312; 

 Hume, ibid. p. 494 ; id. Cat. No. 965 ; id. S. F. viii, p. 115 ; Sculli/, 

 ibid. p. 363 ; Hume ti Marsh. Game-B. iii, p. 215 ; Vidal, S. F. ix, 

 p. 93 ; Butler, ibid. p. 438 ; Beid, ibid, x, p. 83 ; Hume, ibid. p. 418 ; 

 Oates, B. of B. B. ii, p. 286 ; Barnes, B. of Bom. p. 410 ; Hume, S. F. 

 xi, p. 346 ; id. Nests and Eggs (Gates' ed.), iii, p. 291 ; Salvadori, 

 Cat. B. M. xxvii, p. 293; Blanford, Avifauna B. I. iv, p. 449 ; Oate.s, 

 Game-B. ii, p. 119; Stuart Baker, J. B. N. H. S. xii. p. 445 (1899) ; 

 id. Indian Ducks, p. 188 (1908). 



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