RED-CRESTED POCHARD. 189 



ashy-white : the breast and sides of the body are 

 yellowish-brown : the belly and vent are grey : the 

 back, wings, and tail are brown, slightly shaded with 

 ochraceous : the back is without the white spot on its 

 sides : the speculum and half the wing are greyish- 

 white ; the rest of the wing is bright brown : the 

 base of the quills is white, shaded with brown : the 

 beak, tarsi, and toes are reddish-brown. 



The trachea of this bird, which is broad immediately 

 beneath the upper larynx, becomes suddenly very nar- 

 row, but towards the middle of its length its dia- 

 meter becomes very large, and then narrow : the lower 

 larynx is formed of two dilatations, that on the left 

 side being largest and highest, with osseous ramifica- 

 tions, which are covered with a delicate membrane. 



A native of the north-eastern parts of Europe, 

 and part of Asia, appearing periodically in Hungary, 

 Austria, and Turkey, and occasionally as far west as 

 the lakes of Switzerland. It likewise migrates to the 

 Caspian Sea. It feeds upon mollusca and aquatic 

 vegetables. 



