MIGEATION. 157 



haunts. This migration commences as soon 

 as the snow begms to disappear, and is very 

 gradually performed, the animals receding 

 from hill to hill, remaining a few days upon 

 each. 



At this season the males keep in large 

 flocks, apart from the females ; as many as a 

 hundred may occasionally be seen together. 

 During the heat of the day they rarely 

 move about, but rest and sleep, either on 

 the beds of snow in the ravines, or on the 

 rocks and shingly slopes of the barren hill 

 sides, above the limits of vegetation. Some- 

 times, but very rarely, they mil lie down 

 on the grassy spot where they have been 

 feeding. Towards evening they begin to 

 move, and proceed to their grazing grounds, 

 which are often miles away. They set out 

 walking slowly at first, but if they have 

 any considerable distance before them soon 

 break into a trot, and sometimes the whole 

 flock will go as hard as they can lay legs 

 to the ground. From what we could gather 

 from the natives, we concluded that they 



