BIRDS OF NORTH AMERICA. 683 
SUBGENUS POLYBORUS, Vieul. 
5. Falco Braziliensis, Gmel. — Brazilian Caracara Eagle. 
Upper part of head and nape, brownish black; throat, yellowish white ; 
upper parts, barred with brown and dull white; lower parts, with brown 
and reddish white. Male, 234, 4c. Habitat, Texas and Florida. Nests 
in tall trees ; eggs, two. 
Polyborus vulgaris, 4ud. ii. 350; v. 351; plate 161.— Polyborus Braziliensis, Aud. 
Syn. p. 4. 
af SUBGENUS HALLETUS, Suvigny. 
6. Falco Washingtoni, 4ud.— Bird of Washington. 
Bill, bluish black ; cere, yellowish brown ; feet, orange yellow ; general 
color of plumage, blackish brown, with a coppery tint. Male, 43, 122. 
Nests in inaccessible cliffs. Habitat, throughout the Union. 
males pyorlungtont, Aud. i. 58. Nutt. i. 67. — Halietus Washingtoni, Aud. Syn. p. 10; 
plate 11. 
7. Falco leucocephalus, Linn. — White-headed Eagle, Wilson, pp. 
325 and 469. 
Habitat, all North America. Nestsinhightrees. Eggs, four, dull white. 
Falco leucocephalus, Bonap. Syn. p.26. Nutt. i. 72. Aud. i. 160 7 ii. 160; v. 354; 
plates 31 and 126. — Aquila leucocephala, Swain. & Rich. B. A. ii. 15. — Halietus 
leucocephalus, 4ud. Syn. p. 10. 
SUBGENUS PANDION, Savigny. 
8 Falco haliztus. — Fish-Hawk, Wilson, p. 334. 
Habitat, all North America. 
Falco halietus, Bonap. Syn. p. 26. Nutt. i. 18. Aud. i. 415; v. 362. — Pandion hali 
tus, Aud. Syn. p. 12. 
SUBGENUS FALCO, Lina. 
9. Falco Islandicus, Lath. — Gyr Falcon. 
Plumage, white, with slate gray sagittate spots ; bill, pale blue; cere and 
feet, yellow. Young, brownish gray, with spots and margins of reddish 
white. Nests on high rocks and cliffs. Habitat, from Canada to the Arc- 
tic revions. Male, 224,49. Female, 23%, 514. 
Falco Islandicus, Rich. & Swain. F. B. A. ii. 27. Mutt. i. 51. Aud. ii. 552; iv. 476 ; 
Syn. p. 15; plates 196 and 366. 
10. Falco Peregrinus, Gmel.— Wandering Falcon, Hilson, p. 677. 
Falco peregrinus, Bonap. Syn. p. 27. Nutt. i. 53. Rich. & Steoun. F. B.A. ii. 23. 
ud. i. 85; v. 365; plate 16; Syn. p. 16. 
*11. Falco columbarius, Linn. — Pigeon Hawk, J¥ilson, p. 166. 
Habitat, through the whole of North America. Nests in low fir-trees, 
twelve feet from the ground. Eggs, three, dull yellowish brown, with 
dark, reddish brown blotches. Male, 103, 27. Female, 14, 30. 
Falco columbarius, Bonap. Syn. p. 38. Nuit. i. 60. Swain. & Rich. F. B. A. ii. 35. 
Aud. i. 466; v. 368; Syn. p. 16; plate 92.— Falco temerarins, Aud. i. 381; 
plate 75.— Falco Esalon, Swain. §& Rich. F.B. A. ii, 37. 
* Wilson only described the young of this bird. The adult (Falco temerarius 
of Audubon’s Biography) differs principally in. the bluish gray color of its plumage, 
which takes the place of the brownish gray of the young. 
