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Physical Features and Habitats II 
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Broad-winged Hawk, Acadian Flycatcher, Fish 
Crow, Worm-eating and Kentucky Warblers (the 
Barn Owl, Cardinal, Blue-winged Warbler and 
Chat being equally abundant in the Chester val- 
ley, and the Mockingbird, Carolina Wren, Tufted 
Tit and Carolina Chickadee are more often found 
in the southern part of the county) ; all are more 
or less typical of the Carolinian fauna. 
The Black-billed Cuckoo, Scarlet Tanager and 
Black and White Warbler are more or less com- 
mon, and the occasional presence in the summer of 
the Bobolink, Swamp Sparrow, Rose-breasted Gros- 
beak, Tree Swallow, Chestnut-sided Warbler and 
Redstart, would suggest that a more careful sur- 
vey of the somewhat higher ground of the north- 
western section might reveal a stronger element of 
the Transition zone. 
The so-called “Paoli barrens” is an exposed bed 
of serpentine rock, about eight miles in length and 
from a few hundred feet to more than a mile in 
breadth; beginning more than a mile south of Paoli 
and extending nearly to West Chester. The few 
inches of humus gives sufficient sustenance to a 
coarse native sedge grass, a tangle of greenbriers 
(Smilax glauca and 8. rotundifolia) and a stunted 
growth to scattered groves of scrub-oak (Quercus 
stellata, Q.marylandica, Q.ilicefolia and Q.prutio- 
ides), red cedar (Juniper virginiana), pitch pine 
(Pinus rigida), and among the common herbaceous 
plants, Talinum teretifolium’ is typical of the ser- 
pentine. In this untillable tract the Mourning 
Dove, Long-eared Owl and Nighthawk find congen- 
