56 A BIRD MYSTIC 



some birds, as the instinct for migration is 

 so intense that if any young are unable to 

 fly they are left. What caused this remorse- 

 less migration in the first place, and why 

 does it happen ? Nobody knows. It is 

 one of the problems insoluble by research 

 or reasoning; insoluble as the mystery of 

 life itself. 



