190 Birds of Colorado 
dark shaft-line and a tawny to whitish edging ; tail with five dark and 
five narrower white bands, the terminal band of black tipped with 
white; below white, faintly washed with ochraceous and streaked 
with brown, except on the throat. 
Distribution.—Western North America from southern British Colum- 
bia and the Saskatchewan south to the Mexican border, east to the 
Mississippi, west to the Pacific. 
In Colorado this subspecies appears to be a resident, having been, met 
‘with in both winter and summer, though no authenticated instance 
of its nesting is known. It probably nests in the mountains and 
winters in the plains, but it is quite « rare bird and doubtless has 
been frequently confused with the Pigeon-Hawk. 
The only definite local records are: Silver Lake, Boulder co, 10,000 
feet, September (Henderson), Berthoud’s Pass (Ridgway), Barr Lake 
(Hersey & Rockwell), El Paso co., January, November (Aiken coll.), 
Wet Mountains at 8,000 feet (Lowe). 
Habits.—So far as is known, this little Falcon in no 
way differs from the Pigeon-Hawk in its habits. 
American Sparrow-Hawk. Falco sparverius. 
A.O.U. Checklist no 360—Colorado Records—Baird 54, p. 12; 58, 
p. 13; Allen 72, pp. 152, 159; Henshaw 75, p. 413; Scott 79, p. 96; 
Tresz 81, p. 187; Drew 81, p. 141; 85, p.17; Allen & Brewster 83, 
p. 197; Beckham 85, p. 143 ; 87,p.124; Morrison 88, p.115 ; 89, p. 65; 
Kellogg 90, p. 87; Bendire 92, p. 309; Lowe 92, p.101; 94, p. 268; 
04, p. 276 ; Cooke 97, pp. 18, 76, 204 ; Henderson 03, p. 235 ; 09, p. 230; 
Dille 03, p. 74; Warren 06, p. 20; 08, p. 21; Gilman 07, p. 154; 
Markman 07, p. 156; Hersey & Rockwell 09, p. 117. 
Description.—Male—Centre of the crown, back, scapulars and tail- 
feathers, except the outermost, rich rufous, the back with a few trans- 
verse bars of black ; a ring round the crown and the wing, except the 
primaries, slaty-blue, the latter with black spots; nape pale rufous, 
with a black central patch and three others paired on either side of the 
face ; primaries black, with white indentations on the inner web; tail 
with a broad, black terminal band tipped with white, outer pair of tail- 
feathers chiefly white, barred with black; below white, washed with 
tawny on the chest and with s few small dusky spots chiefly on the 
flanks ; iris brown, bill bluish-horn, cere and legs yellow. Length 
10-5; wing 7-4; tail 5-0; culmen -6; tarsus 1-45, 
The female has the whole back, tail and wings transversely barred 
with rufous and dusky ; the indentations on the primaries are tinged 
with tawny, and the lower parts white, streaked with pale sepia-brown 
