io8 
(ECONOMY 
cannot fly, and are therefore obliged to run in- 
to the woods ^ but then the moor-berries and 
bilberries are ripe, from whence they are 
abundantly fupplied with food. Whereas the 
young do not moult the firil fummer, and 
therefore, tho’ they cannot run fo well, are 
able to efcape danger by flight. 
The reft of the birds who feed upon infe&s 
migrate every year to forreign regions, in or- 
der to feek for food in a milder climate \ while 
all the northern parts, where they live well in 
the fummer, are covered with fnow. 
Infers in the winter generally lye hid with- 
in their cafes, and are nourifhed by the fur- 
rounding liquor like the foetus of other ani- 
mals, from whence at the approach of fpring 
they awake, and fly forth to the ailoniihment 
of every one. 
However all animals which lye hid in win- 
ter, do not obferve thefe laws of failing. Some 
provide ilore-houfes in fummer, and autumn, 
from which they take what is neceflary, as 
mice y jay $.) fquirrels , bees, 
§. 17. 
What i have obferved in a few words con- 
cerning the migration of birds into forreign 
conn- 
