BIRDS—CORVIDAE—PICICORVUS COLUMBIANUS. 
573 
Comparative measurements of species. 
Catal. No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch of 
wings. 
Wing. 
Tail. 
Tarsus. 
Q 
O 
0> 
S 
Its claw 
alone. 
Hind toe 
and claw. 
Hind claw 
alone. 
Bill above. 
Along gape. 
Specimen 
measured. 
4451 
12.60 
7.70 
5.16 
1.36 
1.34 
0 51 
1.73 
1.80 
1.03 
0.56 
8895 
o 
ii. ye 
7.03 
4.73 
1.42 
1.46 
0.52 
1.68 
1.73 
1.06 
0.60 
V 
12.50 
21.50 
7.12 
8468 
Gymnokitta cyanocephala 
9.66 
5.88 
4.70 
1.46 
1.12 
0.36 
1.34 
1.40 
0.84 
0.44 
liuquerque. 
do. 
10.00 
18.00 
6.00 
PICICORVUS COLUMBIANUS, Bon. 
Clarke’s Crow. 
Corvus columbianus, Wilson, Am. Orn. Ill, 1811, 29; pi. xx.— Bon. Obs. Wilson, 1824, No. 38 .—Ib. Syn. 1828, 
57.— Nbttall, I, 1832, 218. 
Nucifraga columbiana, Aur>. Orn. Biog. IV, 1838, 459 ; pi. 362 .—Ib. Syn. 1839, 156 .—Ib. Birds Amer. IV, 1842, 
127 ; pi. 235.— Bon List, 1838.— Nbttall, Man. I, 2d ed 251. 
Picicorvus columbianus, Bonap. Consp. 1850,384 .—Newbeiiry, P. II. R. Rep. VI, iv, 1837, 83. 
“ Co'vus megonyx, Wagler.” 
Sp. Ch. —Tail rounded or moderately graduated, the closed wings reaching nearly to its tip. Fourth quill longest ; secon 
considerably shorter than the sixth. General color bluish ash, changing on the nasal feathers, the forehead, sides of head, 
(especially around the eye,) and chin, to white. The wings, including their inner surface, greenish black, the secondaries and 
tertials, except the innermost, broadly tipped with white ; tail white, the inner web of the fifth feather and the whole of the sixth, 
with the upper tail coverts, greenish black. The axillars plumbeous black. Bill and feet black, 
i ength of male, (fresh,) 12 inches ; wing, 7 ; tail, 4.30 ; tarsus, 1,20. 
//aft.—From Rocky mountains to Pacific. East to Fort Kearney. 
The tail of this species is nearly even, or hut slightly rounded, the lateral feathers being 
about .20 of an inch shorter than the other white ones. Sometimes, however, the middle black 
feathers project beyond the rest for nearly half an inch. 
There is considerable variation in the size of this species, as well as a striking difference in the 
length of the bill. Thus, in 4460, from the Cascade mountains, the bill is nearly two inches long, 
slender and attenuated, exceeding by half an inch that of 8239. The length is 12.50 inches ; 
wing, 7.50 ; tail, 4.65. The general color is sometimes quite pale bluish ash, becoming appre¬ 
ciably lighter on the head. The female is quite similar. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig’l 
No. 
Collected by— 
Length. 
Stretch 
ofwings. 
Wing. 
Remarks. 
8472 
s 
Sept. 2,1853 
11.75 
21.50 
7.12 
8240 
9 
30 miles east of Ft. Kearney. 
Oct. 24,1857 
W. M. Magravv... 
222 
Dr. Cooper. 
12.25 
22.00 
7.75 
Bill and feet black. 
8239 
s 
221 
12.00 
22.00 
7.75 
8878 
11.00 
20.00 
7.00 
8870 
11.00 
21.50 
7.00 
8871 
.do. 
11.25 
21.50 
7.25 
8872 
s 
Sept. 12. 
12.00 
24.00 
7.50 
8874 
8875 
9 
12.50 
21.50 
7.12 
1929 
$ 
.Tune 16,1834 
S. F. Raird .. 
6999 
2 
July 26,1857 
334 
W. S. Wood. 
8473 
8475 
Nov. 15,1853 
8474 
Nov. 16,1853 
4460 
4461 
8470 
29 
8471 
Sept. 1,1853 
10 
. 
