28 NATURAL HISTORY 
Young broods of /wallows began to appear this j^ear on Jidy the 
eleventh, and young martins (hirundines urbka-J were then fledged in 
their nefts. Both fpe.cies will breed again once. For I fee by my 
faioia of laft year, that young broods came forth fo late as September 
the eighteenth. Are not thefe late hatchings more in favour of hiding 
than migration ? Nay, fome young martins remained in their nefts 
laft year fo late as September the twenty-ninth ; and yet they totally 
difappeared with us by the fifth of 05iober. 
How ftrange is it that the fivift, which feems to live exadly 
the fame life with the fwalhw and houfe-martin, fliould leave us 
before the middle of Augujl invariably ! while the latter flay often 
till the middle of October ; and once I faw numbers of houfe- 
martins on the fevcnth of November. The martins and red-zv'ing 
fieldfares were flying in fight together ; an uncommon affem- 
blage of fummer and winter-birds ! 
A little yellow bird (it is either a fpecies of the alauda trl-vialis, 
or rather perhaps of the motacilla trochilus) ftlU continues to make 
a fibilous fhivering noife in the tops of tall woods. The Jloparola 
of Ray (for which we have as yet no name in thefe parts) is called, 
in your Zoology, the fiy-eatcher. Thei'e is one circumflance charac- 
teriflic of this bird, which feems to have efcaped obfervation, 
and that is, it takes it's ftand on the top of fome ftake or poft, 
from whence it fprings forth on it's prey, catching a fly in the air, 
and hardly ever touching the ground, but returning ftill to the 
fame ftand for many times together. 
I perceive there are more than one fpecies of the motacilli 
trochilus: Mr. Derham fuppofes, in Rafs Pkilof. Letters, that he 
has difcovered three. In thefe there is again an inflance of fome 
very common birds that have as yet no Englifh name, 
Mr. 
