TREATISE ON FLY-FISHING. 29 



The migrations of salmon and trout are 

 evidently for the purpose of depositing their 

 ova or of finding food after they have spawned* 



Swallows and bee-eaters, decidedly pursue flies 

 half the globe over ; the snipe tribe in like man- 

 ner, search for worms and larvsB flying from 

 those countries where either frost or dryness pre- 

 vents them from boring making generally small 

 flights at a time, and resting on their travels where 

 they find food. A journey from England to Africa 

 is no more for an animal that can fly with the wind 

 one hundred miles in an hour, than a journey for 

 a Londoner to his seat in a distant province. 



The migration of smaller fishes or birds always 

 occasions the migration of larger ones, that prey 

 on them : thus, the seal follows the salmon in 

 summer, to the mouths of rivers the hake follows 

 the herring and pilchard hawks are seen in 

 great quantities in the month of May, coming 

 into the east of Europe after quails and landrails 

 and locusts are followed by numerous birds, 



