1915] 
Cahn: Ecology of Wingra Springs Region 
169 
Dendroica virens (Gmelin). Black-throated Green Warbler. 
Common during a period of about a week in zone six. 
Dendroica vigorsi (Audubon). Pine Warbler. 
Abundant in the tops of the highest trees during the migra- 
tion, and because of its tree-top habits is confined strictly to 
zone seven. 
Dendroica palmarum palmarum (Gmelin). Palm Warbler. 
Similar to the last species in habits and distribution. 
Seiurus aurocapillus (Linnaeus). Oven-bird. 
Quite common in the inner area of zone seven during the 
migration. Remains closely to its habitat — always on the 
ground — and usually among the tangle of underbrush. 
Seiurus noveboracensis noveboracensis (Gmelin). Water- 
thrush. 
Abundant along the courses of the stream where bushes or 
underbrush is present, and usually in zone six. 
Oporomis agilis (Wilson). Connecticut Warbler. 
Another of the ground-loving species, found in zones six and 
seven (border). Stomach examinations show a predominance 
of beetles over other insects. 
Geothlypis trichas trichas (Linnaeus). Maryland Yellow-throat. 
A common inhabitant of zone five, breeding in some numbers. 
Wilsonia pusilla pusilla (Wilson). Wilson’s Warbler. 
Common in zone six during the last quarter of the spring migra- 
tion. Frequents bushes of varying heights, from four to eight 
feet. 
Wilsonia canadensis (Linnaeus). Canada Warbler. 
A few of this species are noted on each migration, either in 
six or seven, but the species finds its optimum in six. 
Steophaga ruticilla (Linnaeus). Redstart. 
linds its optimum in six, but frequents eight also. 
Dumetella carolinensis (Linnaeus). Catbird. 
Common in the swamp, usually in zone six, and quite frequent 
along the border of zone seven. 
Toxostoma rufum (Linnaeus). Brown Thrasher. 
Common and a breeding species in both zones six and eight. 
Seven nests were found, of which three were on the ground, two 
within one foot of the ground, and the remaining two within 
thirty inches of it, all in heavy tangle. 
