BIRDS — BUTEONINAE BUTEO SWAINSONI. 19 
List of specimens. 
Measurements. 
miber. 
Locality. 
When collected. 
Whence and how ob- 
1 
Collected by- 
o 
a 
tained. 
1 
"5 o 
:tweei 
o 
© 
(2 
5575 
5990 
7599 
8632 
6908 
Aug. — , 1855 
Oct. — , 1856 
$ 
Nov. 2, 1857 
11.50 
21.50 
6954 
5584 
5845 
5842 
5844 
8514 
4198 
4512 
6867 
8513 
9 
S 
9? 
9? 
9? 
a 
Aug. 11, 1857 
Aug. 14, 1856 
Aug. —,1856 
387 
262 
544 
543 
541 
94 
11.00 
13.00 
13 00 
13.50 
11.50 
18.15 
23.00 
25.00 
25.50 
21.50 
do 
Sept. —,1856 
do 
Sept. 23, 1854 
Winter 1853-54 
3 
Dec. — , 1854 
23 
Sub-Family BUTEONINAE— T he Buzzards. 
General form heavy, flight vigorous and long continued, but not so rapid as in the preceding sub-families. Subsist mainly on 
small quadrupeds and reptiles. 
BUTEO, Cuvier. 
Buteo, Cuvier, Regne Animal I, 323, (1817.) 
Bill short, wide at base ; edges of upper mandible lobed ; nostrils large, ovate ; wings long, wide, fourth and fifth quills usually 
longest ; tail moderate, rather wide ; tarsi moderate, robust, with transverse scales before and behind, laterally with small circular 
and hexagonal scales ; toes moderate, or rather short ; claws strong. Contains about thirty species, inhabiting all countries. 
Sub-Genus Buteo. 
BUTEO SWAINSONI, Bonaparte. 
Swainson's Buzzard. 
Buteo Swainsoni, Bonap. Comp. List, p. 3, (1838.) 
"Buteo vulgaris," Rich & Sw. Faun. Bor. Am. Birds, p. 47. 
The obtaining of this species is one of the most interesting results in ornithology attained by 
the surveying and exploring expeditions. Previously it was entirely unknown to American 
naturalists, who for the greater part followed the errors of European ornithologists in mistaking 
for it quite a distinct and very different bird, (Buteo montanus, Nuttall.) It possesses additional 
interest, too, in being more nearly related to a generic form of the Old World (typical Buteo) 
than any bird hitherto discovered inhabiting the continent of America. 
All the specimens in the present collection are apparently of mature size, and the plumage is 
