THE RETURN OF THE BIRDS 19 
gist will direct you where to look for the greenlets, 
the wood sparrow, or the chewink. In adjoining 
counties, in the same latitude, and equally inland, 
but possessing a different geological formation and 
different forest-timber, you will observe quite a 
different class of birds. In a land of the beech and 
sugar maple I do not find the same songsters that I 
know where thrive the oak, chestnut, and laurel. 
In going from a district of the Old Red Sandstone 
to where I walk upon the old Plutonic Rock, not 
fifty miles distant, I miss in the woods the veery, 
the hermit thrush, the chestnut-sided warbler, the 
blue-backed warbler, the green-backed warbler, the 
black and yellow warbler, and many others, and 
find in their stead the wood thrush, the chewink, 
the redstart, the yellow throat, the yellow-breasted 
flycatcher, the white-eyed flycatcher, the quail, and 
the turtle dove. 
In my neighborhood here in the Highlands the 
distribution is very marked. South of the village 
I invariably find one species of birds, north of it 
another. In only one locality, full of azalea and 
swamp-huckleberry, I am always sure of finding the 
hooded warbler. In a dense undergrowth of spice- 
bush, witch-hazel, and alder, I meet the worm-eat- 
ing warbler. In a remote clearing, covered with 
heath and fern, with here and there a chestnut and 
an oak, I go to hear in July the wood sparrow, and 
returning by a stumpy, shallow pond, I am sure to 
. find the water-thrush. 
Only one locality within my range seems to pos- 
