THE BIRDS OF MONGOLIA ETC. 105 



270. EuNETTA GLOciTANS, Pall. Utka cloctun. 



Temm. & Schleg. Faun. Jap. pi. Ixxxii. 



During migration, in the end of March and the beginning of April, we 

 met with it in large numbers at Dalai-nor, but did not find it further 

 west, although it can easily be distinguished from the other Ducks by its 

 voice. It also occurs about Lake Baikal, whither it most likely migrates 

 from China proper, probably crossing the desert in a direct line, or else 

 following its edge. 



At Lake Hanka it is one of the most plentiful Ducks, and arrives there in 

 very large flocks from the 8th to the 15th of March. 



When migrating, these Ducks fly very low, following the plains which 

 abound with lakes ; and as soon as one is perceived that is not frozen, 

 especially in cold and stormy weather, they at once settle down on it. 

 The presence of such a flock is always known at a good distance, as the 

 drakes keep calling even when on the wing. 



The abundance of this species on Lake Hanka continues during all the 

 time of its miration — i. e. all the latter half of March and the first week of 

 April ; but after that time their numbers decrease quickly, and in the middle 

 of May there is not a single one to be seen. 



271. Chaulelasmus STREPERUS, L. Utka pohiha. 



We only fell in with a few migrating individuals in S.E. Mongolia early 

 in April, and but one single bird at Lake Hanka towards the end of the 

 same month. 



272. Spatula clypkata, L. Utka socsiin. 



A few birds were seen on Lake Dalai-nor, where the earliest migrants 

 w^ere noticed on the 30th of March; but some few may have come even 



VOL. III. ^ 



