THE FORESTS AND SPORT OF SIBERIA. 



133 



The only stationary animals, in the usual sense of the word, 

 seem to be certain mountain species and those which hibernate in 

 caves and holes; all the rest migrate more or less regularly. At the 

 pairing and nesting time all the West Siberian animals segregate 

 themselves, except those which are gregarious during the breeding 



1'ig. 19. .Reindeer Flocking to Drink. 



season. Later on, the parents and their young combine with their 

 fellows in herds or flocks, which, impelled by the need for more 

 readily obtainable food, and perhaps also driven off by the plague 

 of mosquitoes, set out on their wanderings together. Localities rich 

 in fodder attract the herbivorous creatures, which are the first to 

 arrive, but on their heels come others, and finally their enemies. 

 Thus certain parts of the woodland are depopulated and others are 



