MIGRATIONS. 105 



being able to secure one. These birds, if the 

 weather becomes very severe here, are said to fly 

 further south in search of food, and to return 



again. 



Thus, we see the change of seasons brings 

 with it a change in the winged inhabitants of 

 every country ; and the winter immigration of 

 a vast variety of birds, fit for food and other 

 useful purposes, makes up in some degree for 

 the summer or autumnal emigration of those, 

 which being constantly before our eyes moving 

 in every direction, and rendering vocal every 

 grove or tree and even the very heavens, enter- 

 tain our senses of seeing and hearing in a most 

 delightful manner. Thus, also, all countries 

 partake in some degree, by this shifting scene 

 of animal life, of the same blessings and plea- 

 sures derived from the same instruments. 



Though the production and rearing of their 

 young forms a principal feature in most of the 

 migrations before noticed, yet it is most promi- 

 nent and conspicuous in the animals, whose an- 

 nual motions I shall next advert to. And here 

 mankind is more conspicuously indebted to the 

 fatherly care and bounty of a beneficent Provi- 

 dence for a supply of their wants, than in any of 

 the cases above detailed ; which most of them 

 minister to our pleasures, rather than our sus- 

 tenance. When the time of the singing, birds is 



