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Hedges in England > he lent fome Plants of the white 
Thorn over to his own Country for the fame Pur- 
pofesj before which time he aflured me there were 
none of them in Sweden , which I mention, in Sup- 
port of what was faid above. 
The coming of thefe Birds to us may then pretty 
well be accounted for from the Reafons aforego- 
ing 5 but the Caufe of their Departure from hence 
at the time they leave us, is one of thofe Secrets in 
Nature which are not yet difcover’d y for, flhould it 
be fuggefted, that they do not leave us till the Haws 
and Berries are all gone, and they are under a Necef- 
fity to feek for Food elfewhere, this would amount 
to little, unlefs it could be {hewn, that the Northern 
Regions to which they journey can afford them a 
frefh Supply j which it is almoft certain they cannot. 
And therefore, when firft they go from us, they muft 
either alter their Diet, or be in much Diftrefs 5 but, 
as "ris evident their Food in the Summer-time muft 
be of a different Kind than what they eat in Win- 
ter, ’tis mo ft likely they change their Diet ; and then 
one would imagine they fhould find Subfiftence here 
in greater Plenty, and much'fooner than in the colder 
Countries to which they fly. 
In fhort all, we can be faid to know of the Mat- 
ter, ends in this Obfervation, that Providence has 
created a great Variety of Birds, and other Animals, 
with Conftitutions and Inclinations adapted to their 
different Degrees of Heat and Cold in the feveral 
Climates of the World (whereby no Counrry is de- 
ftitute of Inhabitants) and has given them Appetites 
for the Produ&ions of fuch Countries, whofe Tem- 
perature is fuucd to their Nature, as well as Know- 
