ON THE MIGRATION OF BIRDS. 
be led to the choice of materials proper to be in- 
serted in that useful companion, the Naturalist’s 
Journal.* | | 
From the observations of our friends, from 
those made by ourselves, and from the lights 
afforded us by preceding writers, we shall, in 
the brief relation we can pretend to give, pro- - 
ceed in a generical order, and as far as possible, 
trace each species of bird to its retreat. 
~A few words will explain the cause of their 
disappearance in these northern regions; a de- 
fect of food at certain seasons, or the want of a 
secure asylum from the persecution of man 
durmg the time of courtship, incubation and 
nutrition. 
Eagles, and all the ignoble species of this genus 
breed in Great Britain; of the proper Falcons, 
we only know that which is called the Pere- 
rine, which builds its nest annually in the rocks 
of Llandudno, Caernarvonshire ; and the Gentil, 
and the Goshawk, which breed in Scotland. 
We are assured that every species breeds in 
England, except the httle Owl, and short eared 
Owl. The last breeds in Scotland, and the Ork- 
ney isles, but migrates into England at the same 
season as the Woodcocks do. Hawks and owls 
* Printed for W. Sanby, Flect-Street, London, 1767. Price 
One Shilling and Six-pence. 
381 
FALcons: 
OwLs. 
