THE SNOW-COCKS. 85 



were very small, about the size of a Quail, whilst others were 

 quite as large as their parents 



"Both parent birds accompany the brood. Whilst the 

 young are small, they crouch on the approach of danger, or 

 try to hide themselves between the loose stones, whilst the 

 old ones keep on running within about twenty paces from the 

 sportsman; but when they are full grown, they try to escape by 

 running, and follow the cock and hen which are leading the 

 whole flock. When much pressed, however, they fly, and do 

 not alight on the ground again until they have crossed a ravine 

 or valley. 



"These birds are very wild, and, when alone, the old birds 

 do not allow themselves to be approached within a hundred 

 paces. They hide themselves between stones, and usually 

 spring up and take to flight, or else try to run, which they do 

 so fast that a man cannot catch them. 



"We noticed that when they are approached from the 

 bottom of a hill they commence running, but if from the top 

 they at once get up. 



"When settling on the ground they shake their tails several 

 times, just as our Willow Grouse do." 



Nest and Eggs. — Little or nothing is known. Prjevalsky found 

 a nest containing broken shells, which he believed were evidently 

 of this species. He describes them as " larger than those of 

 the common hen, of a dirty white, shaded with green, and 

 marked on the smaller end with blackish-brown spots." 



II. PRINCE HENRY'S SNOW-COCK. TETRAOGALLUS 

 IIENRICI. 



Tetraogallus heni'ici, Oustalet, Ann. Sci. Nat (7), xii. pp. 295, 

 313 (1891); Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 106 

 (1893). 

 Adult Male and Female. — Said to differ from T. tibetanus 



in having the colour of the throat and chest grey, with only a 



