10 
COOPER’S HAWK. 
brown; the cere greenish-yellow; the angles of the mouth yellow. 
The irides are bright-yellow. The general colour above is 
chocolate-brown, the feathers being whitish-gray at base; on the 
head, and neck above, they are blackish, margined with rufous, 
pure white towards the base, and grayish at the bottom, the white 
colour showing itself on the top and sides of the neck, and being 
much purer on the nucha. The back and rump are the same, 
but the feathers larger, and lighter coloured, less margined with 
rufous, more widely grayish at base, and bearing each four regular 
spots of white in the middle of their length, which are not seen 
unless when the feathers are turned aside. The whole body 
beneath is white, each feather, including the lower wing-coverts 
and femorals, marked with a long, dusky medial stripe, broader 
and oblanceolate on the breast and flanks, (some of the feathers of 
which have also a blackish band across the middle,) the throat, 
and under wing-coverts; the long feathers of the flanks (or long 
axillary feathers) are white banded with blackish; the vent and 
lower tail-coverts pure white; the wings are nine inches long, and 
when folded, hardly reach to the second bar of the tail from the 
base; the smaller wing-coverts and scapulars, are like the back, 
the quills brown above, (lighter on the shaft) and silvery-gray 
beneath, regularly crossed by blackish bands, less conspicuous 
above; the space between the bands is white on the inner vanes 
at base; some of the secondaries and tertials are tipped and edged 
with rusty, and have more and more of white as they approach 
the body, so that those nearest may in fact be described as 
white banded with blackish. The first primary is very short, 
more so than the secondaries; the second is equal to the sixth, the 
third to the fifth, these two last mentioned being hardly shorter 
than the fourth, which, as in all Jlstures, is longest. The tail is 
full eight inches long, reaching five beyond the wings; its colour 
is ashy-brown, much paler beneath, tipped with whitish, and 
