NORTH AMERICA. 
that moft of thefe above mentioned are ftrangers ; 
or not really bred where they wintered ; but are 
more northern families, or fojourners, bound fou- 
therly to more temperate habitations ; thus pufh- 
ing each other foutherly, and polfefTing their va- 
cated places, and then back again at the return of 
fpring. 
Very few tribes of birds build, or rear their 
young, in the fouth or maritime parts of Virginia 
and Carolina, Georgia and Florida ; yet all thefe 
numerous tribes, particularly pf the foft billed 
kinds, which breed in Pennfylvania, pafs in the 
fpring feafon through thefe regions in a few weeks 
time, making but very fhort flages by the way : 
and again, but few of them winter there, on their 
return foutherly : and as I have never travelled 
the continent fouth of New Orleans, or the point 
of Florida, where few or none of them are to be 
feen in the winter, I am entirely ignorant how far 
fouthward they continue their route, during their 
abfence from Pennfylvania ; but perhaps none of 
them pafs the tropic. 
When in my refidence in Carolina and Florida, 
I have feen vaft flights of the houfe fwallow (hirur- 
do pelafgia) and bank martin (hirundo riparia) paf- 
fmg onward north toward Pennfylvania, where they 
breed in the fpring, about the middle of March, 
and likewife in the autumn in September or Oclo- 
ber, and large flights on their return fouthward. 
And it is obfervable that they always avail them- 
felves of the .advantage of high and favourable 
winds, which likewife do all birds of paiTage. The 
pewit, or black cap flycatcher, of Catefby, is the 
fir ft bird of palfage which appears in the fpring in 
Pennfylvania, which is generally about the firft, or 
middle 
