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).