BIRDS—BUTEONINAE-BUTEO PENNSYLVANIA'S 
29 
white. Under wing coverts dark rufous, transversely barred with reddish white. Throat brownish black, with a few white 
feathers. Feathers of the breast having dark lines on their shafts. Upper parts dark brown; on the head and back edged with 
rufous ; upper coverts of the tail narrowly tipped with white. Shoulders dark rufous, every feather having a narrow central 
stripe of dark brown ; superior coverts of the wing dark brown ; edged on their inner webs with rufous, and with transverse 
stripes partially concealed, and with circular spots of white, and tipped with the same. Quills brownish black ; primaries and 
secondaries with numerous irregular transverse bands of white, running obliquely on their inner webs ; all the quills tipped 
with white. Tail brownish black ; white at base, with four transverse bands of white, and tipped with the same. Bill bluish 
black ; tarsi and cere yellow. 
Young female. —Under parts yellowish white ; every feather with wide irregular and confluent bands of dark brown, and at 
its end a large arrow head of the same color. These bands and sagittate spots giving the predominating color to the breast and 
sides, but less numerous on the abdomen and under tail coverts. Tibial feathers and under coverts of the wings and tail tinged 
with pale rufous ; shoulders with a few rufous feathers. Throat dark brown, with longitudinal narrow stripes of white. Upper 
parts dull brown ; many feathers edged with reddish white, especially on the back and wing coverts. Quills brownish black, 
with their inner webs barred with white. Tail brown, tinged with ashy, with about ten to twelve transverse narrow bars of a 
darker shade of the same color, and tipped with white. 
Young male. —Similar to the last described, but with the sagittate spots on the under parts more elongated, and the upper 
parts and shoulders strongly tinged with rufous. Under wing coverts and tibiae dark rufous. 
Dimensions. —Adult female, total length, about 20 inches; wing, 13 ; tail, 9 inches. Young male, 18J^; wing, 12%', tail, 8 inches. 
This very handsome bird is nearly related to Buteo lineatus, as stated above ; but all the 
specimens constantly present differences. In the adult of the present species the under parts 
are of a much darker red and more uniformly presented than in Buteo lineatus, in which those 
parts are orange red, and the abdomen and under tail coverts nearly white. 
The young bird of the present species is strongly characterized by the large sagittate spots of 
the under parts, which we have never seen in the young of Buteo lineatus. 
The plate represents the adult and young of this handsome hawk. Plate II is the fully 
mature plumage, and Plate III the young in the plumage invariably presented in all the speci¬ 
mens in the collections of the expeditions. 
List of specimens. 
Catalogue number. 
Sex and age. 
Locality. 
When collected. 
Whence and how 
obtained. 
Original number. 
Collected by— 
4520 
o 
Santa Clara, California..__ 
Dr. Cooper__ 
Kennerly, and_ 
8524 
Camp on Little Colorado, N. Mexico 
Nov. 17, 1853 
Lieut. Whipple_ 
32 
Mollhausen_ 
4618 
Santa Isabel, California___ 
Oct. 29, 1854 
Major Emory_ 
23 
A. Schott._ 
BUTEO PENNSYLVANICUS, Wilson. 
The Broad-winged Hawk. 
Falco pennsylvanicus, Wilson, Am. Orn. VI, 92, (1812.) 
Falco latissimus, Wilson, Am. Orn. VI, 92, (1812, copies printed later than those containing the preceding name.) 
Sparviusplatypterus, Vieill. Ency. Meth. Ill, 1273, (1823.) 
Falco Wilsonii , Bonap. Jour. Acad. Philad. Ill, 348, (1824.) 
Figures. —Wilson Am. Orn. VI, pi. 54, fig. 1 ; Aud. B. of Am., pi. 91, Oct. ed. 1, pi. 10 ; Nat. Hist. New York, Birds, 
pi. 5, fig. 11. 
Smaller than either of the preceding. Mult. —Entire upper parts umber brown, feathers on the occiput and back of the neck 
