Birds of the Caucasus. 33 



Phcenicopterus roseus. 



The Flamingo has not been found breeding in the Caucasus, 

 but is often seen as an occasional visitor. 



Cygnus olor. 



The Mute Swan is common in the Caucasus, and is said to 

 breed in the delta of the Terek. 



Cygnus musicus. 



The Whooper Swan winters in the Caucasus. 



Anser ctnereus. 



The Grey-lag Goose breeds in great numbers in the valley, 

 and especially in the delta, of the Terek. 



Anser segetum. 



The Bean-Goose passes the Caucasus in great numbers on 

 migration ; and a few winter on the southern shores of the 

 Caspian. 



Anser albifrons. 



The White-fronted Goose is very common in winter on the 

 southern shores of the Caspian, and on the lakes of the south- 

 west Caucasus. 



Anser erythropus. 



The Little White-fronted Goose winters on the southern 

 shores of the Caspian. 



Bernicla ruficollis. 



The Red-breasted Goose visits the Caspian in large flocks 

 on the autumn migration. 



Tadorna vulgaris. 



The Sheldrake is very common in the Caucasus : it is pro- 

 bably a resident. 



Tadorna casarca. 



The Ruddy Sheldrake is a common resident throughout 

 the Caucasus, except on the mountains. 



Anas boschas. 



The Mallard is a common resident in the plains of the 

 Caucasus. 



SER. v. VOL. I. D 



