THE COOPER HAWK. 499 
base of the tree will flush the sitting bird, and it will not often leave until the 
nest is almost reached. When disturbed both birds make a high-spirited de- 
fense; and the female, who is, of course, the larger, will dart at the climber 
so boldly as occasionally to brush him with her wings. A wrathful yip, yp, 
yip, vip, yip, is likely to accompany this attack; and the note serves again to 
remind one of the bird’s affinity to the Cooper Hawk. 
No. 202. 
COOPER’S HAWK. 
A. O. U. No. 333. Accipiter cooperii (Bonap.). 
Synonym.—CuIcKkEN Hawk. 
Description Adult: Similar to preceding species, but decidedly larger; the 
top of head deeper slate, or blackish; the tail slightly or considerably rounded ; 
sides of breast often tinged with bluish gray. Jimmature: Similar to preceding 
species; streaking of underparts less abundant, more sharply defined, and of 
darker shades; belly and sometimes throat immaculate, or tending to become so. 
Differences between adult and young rather more clearly marked than in 4. velox. 
Very variable in-size. Adult male length 14.00-17.00 (355.5-431.8) ; wing 8.50- 
9.50 (215.9-241.3); tail 7.00-8.50 (177.8-215.9); bill from cere .60-.65 (15.2- 
16.5). Adult female length 18.00-20.00 (457.2-508); wing 9.75-I1.00 (247.6- 
279.4); tail 8.50-10.00 (215.9-254); bill from cere .70-.80 (17.8-20.3). 
Recognition Marks.—Crow size; adult heavily barred below with cinnamon- 
rufous; young heavily striped on breast and sides with dark brown or dusky ; 
top of head blackish, tail long, rounded. Almost always distinguishable from 4. 
velox by greater size. 
Nesting.—Nest: of sticks and green leaves, high in trees. Sometimes a 
deserted Crow’s nest is used. Eggs: 3-6, pale bluish white, sometimes spotted 
with light brown; subspherical. Avy. size, 1.92 x 1.52 (48.8 x 38.6). Season: c. 
May 20; one brood. 
General Range.—North America from southern British America south to 
southern Mexico. Breeds thruout its range. 
Range in Washington.—Rare summer resident and migrant; doubtfully 
recorded from east of the Cascades. 
Authorities.—<Astur cooperi, Newberry, Rep. Pac. R. R. Surv. VI., pt. IL., 
USS 7a eA COS) Riis! (2) keke Baik 
Specimens.—U. of W. Prov. 
IT IS hard for those of us, daffy bird-cranks, who go into a trance at the 
sight of a feather, to pass sentence of death upon any bird; but since we have 
so often said, “Let be! let be!’ when the hand of the gunner was raised against 
the Hawk (often for no better reason than that it was a Hawk and might steal 
