OF NATURE. 109 
countries, gives me an opportunity of illu- 
ftrating this fubjed farther by inftances. 
The flarling, Fn. 183. finding with us after the 
middle of fummer worms in lefs plenty, yearly 
goes inot Schonen, Germany and Denmark. 
The female chaffinches every winter about 
Michaelmas go in flocks to Holland ; but as the 
males flay with us, they come back the next 
fpring, unlefs fuch as choofe to breed no 
more. 
In the fame manner the female Caro- 
line yellow-hammer in the month of September, 
while the rice, on which fhe feeds, is laid up 
in granaries, goes towards the fouth, and re- 
turns in the fpring to feek her mate. 
Our aquatic birds are forced by neceflity to 
fly towards the fouth every autumn before the 
water is frozen. Thus we know that the lakes 
of Poland and Lithuania are filled with / wans 
and geefe every autumn, at which time they 
go in great flocks along many rivers as far as 
the Euxine. But in the beginning of fpring, as 
foon as the heat of the fun molefts them, they 
turn back, and go again to the northern pools, 
and lakes, in order to lay their eggs. For there, 
and efpecially in Lapland, there is a vafl: abun- 
dance of knats Fn. 1116. which afford them 
excellent 
