^'"•^•1 m'CHESNEY on birds of DAKOTA. 83 



Falco communis, Vsniomm.— Peregrine Hawlc. 



Arrives early iu April, closely following- the spring migration of the 

 wild fowl, and the majority pass fnrther north ; but a few remain in this 

 \icinity during the summer. 



Faxco coLmiBARius, JAmi.— Pigeon JIawl\ 



Is not of common occurrence on the Coteau. A few- were observed 

 during the last week in April, 1877, and quite a number were shot during 

 the early part of the summer of 1878, but it does not remain through the 

 summer. 



Falco sparveeius, Linji.Simrroio SmvTc. 



, Is found here from April 15 to near the end of October ; is at no time 

 very common. Breeds here. 



BuTEO BOREALis CALURUS, (Cass.) Bigd^v.— Western Ben Hcncl: 



The Western Hen Hawk arrives about the 1st of May, and remains 

 until cold weather drives it to a more southern climate, usually about 

 the 1st of October; is not common. 



BuTEO SWAINSONI, B\).—8wainson^s Buzzard. 



Arrives about May 10, and remains until October 30 ; is seen in con- 

 siderable numbers. Breeds here. 



Aquila chrysaetus, Jjinn.— Golden Eagle. 



Was seen during the spring of 1878 ; also on l^ovember 25, 1878, a 

 single Golden Eagle was seen on the Coteau, about 20 miles east of Fort 

 Sisseton. 



Hali^tus leucocephalijs, (L.) Savigny.— 5«Z(? Eagle. 



Is only a casual visitor to this region. April 30, 1878, a single speci- 

 men was taken in the vicinity of the post. 



CATHAETIDJ3. 



Cathartes aura, (L.) Illiger.— TwrA-ey Buzzard. 



Is found here from May 24 until October 30 in considerable numbers. 

 Breeds here. 



COLUIVIBIDyE. 



EcTOPiSTES MACRURUS, (L.) Coues.— TTlZfZ Pigeon. 



Sexes are different in color. 



$ dull blue with olivaceous tinge on back ; below, dull puiiiHsli-red, wliitoning on 

 vent and under tail-coverts ; sides of neck golden and ruby ; some wing-coverts black- 

 spotted; quills blackish, with slaty whitish and rufous edging; middle tail-feathers 

 bluish-black, the others white or ashy, the inner webs black toward the base, with a 

 chestnut patch; bill black; feet yellow. $ and young duller and more brownish or 

 olivaceous above, below dull grayish, with a tawny tinge anteriorly, or quite gray ; 

 very young have the feathers skirted with whitish : 15 to 17 inches long; wing anrl 

 tail 7-8 inches. Tail of 12 feathers. 



