This is quite an abundant species in some localities, and like the [Duck Hawk] in many ways is one of the most graceful, fearless and swiftest of the Falcons. A blackish patch on the sides of the throat; upper parts brownish with darker markings; under parts white, streaked with brown, much heavier on the flanks. Throat, clear white.
Nest.—Is generally placed on rocky ledges and cliffs, and sometimes in trees. Their nests are made of sticks lined with weeds and grass; three or four eggs of a reddish buff color, thickly blotched and sprinkled all over with reddish brown (2.05 × 1.60).
Range.—West of the Mississippi and from Dakota and Washington south to Mexico. Their food is mostly rodents secured on the prairies.
DUCK HAWK.
356a. Falco peregrinus anatum. 17 inches.
A most beautiful species, with a black patch, or moustache, on side of the throat from the bill; head and upper parts bluish gray with darker markings; under parts white, tinged with huffy on the lower part, and lightly barred with black, with the throat pure white. Their food consists mostly of ducks, which they always take while on the wing. It breeds abundantly on the Pacific coast and in some parts of Dakota on the rocky ledges.
Nest.—They are not home builders as a general thing, but lay their three or four eggs on the gravel or bare rocks of ledges or cliffs. The eggs are a reddish buff color, completely blotched and dotted with reddish brown. These are the darkest, brightest and the most beautiful of the Falcon eggs (2.05 × 1.55).
PIGEON HAWK.
357. Falco columbarius. 12 inches.