TO YELLOWSTONE NATIONAL PARK. 83 
91. ARCHIBUTEO LAGOPUS SANCTI-JOHANNIS, (Gin.) Ridyway. 
ROUGH-LEGGED Hawk. 
«Abondant about Gardiner’s Springs and in the valley of the Yellowstone. 
92. ARCHIBUTEO FERRUGINIUS, (Licht.) Gray. 
FERRUGINOUS Hawk. 
This striking species was common on the plains from the Missouri River westward uutil we 
reached the mountains. It was often seen sitting on the little mounds raised by the prairie-dogs, 
gazing intently at the entrance of the burrow, apparently waiting to seize the first one that 
should appear. i 
93, PANDION HALIALETUS, (Linn) Cur. 
FISH-HAWK. 
The Fish-hawk, althongh occasionally seen on the Missouri, is not, in my experience at 
least, common on that river below the point where it becomes muddy. Above Carroll, however, 
the river is quite clear, and there it seems much more numerous. It was nowhere so abundant as 
on the Yellowstone River; and while traveling along that stream J saw from six to twelve of these 
birds every day. At the falls of the Yellowstone, this species was constantly in sight, sometimes 
sailing like a black speck close to the water far below us, or balancing itself on some dead pine that 
grew half-way up the sides of the caton. 
94. AQUILA CHRYSAETOS, Linn. 
GOLDEN EAGLE. 
Occurs more or less frequently all through the country which we traversed, but is most often 
seen in the mountains and on high wooded buttes. I saw it at the Forks of the Musselshell, near 
Bridger Pass, and once over the Missouri River. 
95. HALIAETUS LEUCOCEPHALUS, (Zinn.) Sw. 
WHITE-HEADED EAGLE. 
Seen several times on the Missouri. 
CATHARTID. 
96. CATHARTES AURA, (Linn.) Fl. 
TURKEY BUZZARD. 
Abundant on the plains. 
COLUMBID. 
97. ECTOPISTES MIGRATORIA, (Linn.) Sw. 
PASSENGER PIGEON. 
Seen iu small companies in July along the Missouri River bottom, where it was doubtless 
ding. 
breeding 98. ZENZZDURA CAROLINENSIS, (Linn.) By. 
Common Dove; TURTLE DOVE. 
Common everywhere. 
