Plate XLIX 
Fig 2. ACCIPITER COOPER/— Cooper's Hawk. 
The Cooper’s Hawk is a common resident of the State. According to Dr. J. M. Wheaton, it is less 
numerous in the Northern than in the Southern Counties. About Circleville it is plentiful in winter and 
summer. The nest is constructed the latter part of April. But one brood is reared bv each pair during 
the season. 
LOCALITY : 
The nest is placed in a tree in a small grove, or in a woods, frequently, near a pond or stream. 
POSITION : 
It is built either in a prependicular or horizontal fork, generally in the hitter position near the ex- 
tremity of a limb fifty feet or more from the ground. Nests are sometimes found much lower, but as a 
rule they are high up in the trees. 
MATERIALS: 
The materials of construction consist principally of coarse sticks, to which grasses, feathers, corn-silk, 
and similar materials may be added for the lining. The nest is a rough affair, measuring from a foot 
and a half to two feet in diameter and but a few inches in thickness. It has been compared to the 
nest of the Crow; but it is by no means so elaborately constructed. Its concavity is very slight, and 
frequently but sparingly lined. 
\\ 
EGGS; 
The eggs of a set vary in number from three to six, four being the usual complement. The shell 
is somewhat granular, and varies in color from chalky white to a faint greenish-blue. Ordinarily it 
is tinted with greenish-blue. Sometimes the tint is of different intensity in different parts of the same 
egg. The markings consist of blotches, spots, and, occasionally, streaks of brown. Usually the marks are 
very indistinct, and may easily be overlooked. Sometimes the brown is decided. The markings are 
most abundant about the base. Some eggs are entirely unmarked. In size the eggs average about 
1.48x 1.90. According to Dr. Brewer, eggs of this species vary from 1.50 to 160 in short-diameter, and 
from 1.85 to 2.00 inches in long-diameter. Dr. Cou.es, in “Birds of the North-West,” gives the vari- 
ations from 1.80 to 2.10 in long-diameter, and from 1.55 to 1.60 in short-diameter. A set of eggs 
collected by Mr. Ghas. Dury of Cincinnati, measures respectively 1.45x1.90, 1.46x1.87, and 1.46x1.88. 
Incubation is said to last twenty-seven days. 
173 
