164 CHECK-LIST OF NORTH AMERICAN BIRDS. 



5. Falco rusticolus gyrfilco Linn^us. Gyrfalcon. [364o.] 



Falco gyrfalco Linn^us, Syst. Nat., ed. 10, 1, 1758, 91. (Sweden.) 



Range. — Arctic regions. Breeds in EUesmere Land, northern Greenland, 

 and east to Franz Josef Land; in winter casual south to Minnesota, New 

 York, Rhode Island, Massachusetts, and Maine. 



u. Falco rusticolus obsolStus Gmelin. Black Gyrfalcon. [3546.] 



Falco obsoletus Gmelin, Syst. Nat., I, i, 1788, 268. (Hudson Strait.) 



Range. — 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 mexicanus Schlegel. Prairie Falcon. [355.] 



Falco mexicanus Schlegel, Abh. Geb. Zool., Heft 3, 1850, 15. (Mexico.) 



Range. — 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. 



Subgenus RHYNCHODON Nitzsch. 



Rhynchodon Nitzsch, Obs. Avium Art. Carot. Comm., 1829, 20. Type, 

 by subs, desig., Falco peregrinus Tunstall (A. O. U. Comm., 1886). 



Falco peregrinus Tunstall. 



Range. — Greater part of Northern Hemisphere, south in winter 

 to Africa and South America. 



a. Falco peregrinus peregrinus Tunstall. Peregrine Falcon. [356.] 

 Falco peregrinus Tunstall, Orn. Brit., 1771, 1. (Great Britain.) 



Range. — Europe and northern Asia; in winter south to Africa and Indian 

 Peninsula; casual in Greenland. 



h. Falco peregrinus dnatum Bonaparte. Duck Hawk. [356a.] 



Falco anatum Bonaparte, Geog. & Gomp. List, 1838, 4. (Egg Harbor, 

 New Jersey.) 



Range. — 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 



