164 CHECK-LIST OF NORTH AMERICAN BIRDS. 
b. Falco rusticolus gyrfalco Linnamzus. Gyrfalcon. [354a.] 
Falco gyrfalco Linnmus, Syst. Nat., ed. 10, I, 1758, 91. (Sweden.) 
Ranae.— Arctic regions. Breeds in Hllesmere Land, northern Greenland, 
and east to Franz Josef Land; in winter casual south to Minnesota, New 
York, Rhode Island, Massachusetts, and Maine. 
c. Falco rusticolus obsolétus Gmetin. Black Gyrfalcon. [354b.] 
Falco obsoletus GMELIN, Syst. Nat., I, i, 1788, 268. (Hudson Strait.) 
RancE.— Breeds in Ungava; south in winter to Nova Scotia, Quebec, 
Ontario, and Maine, and casually to New York, New Hampshire, Massachu- 
setts, and Rhode Island. 
Falco mexicaénus SCHLEGEL. Prairie Falcon. ([855.] 
Falco mexicanus SCHLEGEL, Abh. Geb. Zool., Heft 3, 1850, 15. (Mexico.) 
RaNnGE.— Transition and Sonoran zones from eastern border of the 
Great Plains and from southern British Columbia and southeastern 
Saskatchewan to southern Lower California and southern Mexico; 
casual east to Minnesota and Illinois. 
Suscenus RHYNCHODON Nirzscu. 
Rhynchodon Nirzscu, Obs. Avium Art. Carot. Comm., 1829, 20. Type, 
by subs. desig., Falco peregrinus Tunstaut (A. O. U. Comm., 1886). 
Falco peregrinus ‘TUNSTALL. 
RanGcE.— Greater part of Northern Hemisphere, south in winter 
to Africa and South America. 
a. Falco peregrinus peregrinus TunsTaLu. Peregrine Falcon. [356.] 
Falco peregrinus TuNnstauu, Orn. Brit., 1771, 1. (Great Britain.) 
RanGs&.— Europe and northern Asia; in winter south to Africa and Indian 
Peninsula; casual in Greenland. 
b. Falco peregrinus 4natum Bonaparte. Duck Hawk. [356a.] 
Falco anatum Bonaparte, Geog. & Comp. List, 1838, 4. (Egg Harbor, 
New Jersey.) 
Rance.— North and South America. Breeds locally (except in Northwest 
Coast region) from Norton Sound, Alaska, northern Mackenzie, Boothia 
Peninsula, and western central Greenland south to central Lower California, 
Arizona, southwestern Texas, Kansas, Missouri, Indiana, Pennsylvania, and 
