510 NOTES ON SOME OF THE 
tiful songster so admirably harníonize. This bird I repeat- 
edly recognized from the peculiarity of its notes during 
my several days stay at this locality. Aside from such 
unusual variations as this, which we may consider as acci- 
dental, birds of unquestionably the same species, as the 
Crow, the Blue Jay, the Towhe and others, at remote local- 
ites, as New England, Florida, Iowa, etc., often possess 
either general differences in their notes and song, easily 
recognizable, or certain notes at one of these localities never 
heard at the others, or an absence of some that are else- 
where familiar. This is perhaps not a strange fact, since it 
is now so well known that birds of the same species present 
certain well marked variations in size according to the lati- 
tude and elevation above the sea of the locality at which 
they were born, and that they vary considerably, though 
doubtless within a certain range, in many structural points 
at one and the same locality. In other words, since it is 
known that all the different individuals of a species are not 
exactly alike, as though all were cast in the same die, a$ 
some naturalists appear to have believed. 
Certain irregularities in the breeding range of birds have 
also come to light. It is perhaps not remarkable that a pair 
of birds of species that regularly breed in northern New 
England should now and then pass the summer and réar 
their young in the southern part, as has been the case in 
certain known instances in the Snow Bird (Junco hyemalis), 
the Pine Finch ( Chrysomitris pinus) , and the White-throated 
Sparrow (Zonotrichia albicollis) ; but it is otherwise with 
the Snow Bunting (Plectrophanes nivalis), which rarely 
breeds south of Labrador, of which there is a single well 
authenticated instance of its breeding near Springfield. The 
easual visits of northern birds in winter, which we may 
suppose sometimes results from their being driven south by 
want of food or the severity of the season, are also less 
remarkable, it appears to me, than the occurrence here of 
. Southern species, as of the two Egrets, the Little Blue Heron 


