1915] 
Cahn: Ecology of Wingra Springs Region 
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third, four M. pennsylvanicus, and the fourth, nothing. A pile 
of 31 pellets of this species contained 22 Microtus pennsylvani- 
cus, 8 Blarina brevicauda, and 3 Peromyscus leucopus remains. 
Often seen hunting by day. 
Strix varia varia Barton. Barred Owl. 
A single pair breeds within the formation in the heart of zone 
seven, and occasionally a stray individual wanders into the 
region from the adjoining neighborhood. 
Otus asio asio (Linnaeus). Screech Owl. 
Not uncommon in zone seven, where the species breeds, usually 
• in the border area. Found twice in zone six. 
Order COCCYGES 
Coccyzus americanus americanus (Linnaeus). Yellow-billed 
Cuckoo. 
Zone seven, and occasionally six. A breeding species. 
Coccyzus erythrophthalmus (Wilson). Black-billed Cuckoo. 
A breeding species of the same distribution as the preceding, 
though somewhat more common. 
Ceryle alcyon (Linnaeus). Belted Kingfisher. 
Abundant over the lake as a whole. As there is no suitable 
nesting site within the formation, it can not breed there. The 
following animals have been found in the stomachs of this 
species: Notropis heterodon, N. cayuga, Perea flavescens, Eucalia 
inconstans, and Lepomis pallidus. 
Order PICI 
Dryobates villosus villosus (Linnaeus). Hairy Woodpecker. 
Not common, but found when present in the inner area of 
zone seven. Probably a breeding species. 
Dryobates pubescens medianus (Swainson). Downy wood- 
pecker. 
Inner area of zone seven. Common on the oaks and elms, 
where it is found almost exclusively. Two pair nested within 
the area. 
Sphyrapicus varius (Linnaeus). Yellow-bellied Sapsucker. 
Quite common in the outer area of zone seven. These birds 
do a considerable amount of damage to the trees, even in the 
few days that they are present on the migration. 
