82 THE BIOLOGY OF HARDING COUNTY 



Baird's Sparrow (Ammondramus bairdi). Breeds rarely in the 

 moister draws of the -steppe. Common as a migrant toward 

 the close of August and early in September. 



Western Grasshopper Sparrow (Ammodramus savannarum bima- 

 culatus). Nests in the moister blue-stem swales of the east- 

 ern part of the area. 



Western Lark Sparrow (Chondestes grammacus strigatus). A 

 common breeder in the groves along the streams. They left 

 the region about August. 



White-crowned Sparrow (Zonotrichia leucophrys leucophrys). A 

 few were seen several times early in September. 



Western Tree Sparrow (Spizella monticola ochracea). Common 

 in the Short Pines in December (Saunders). 



Western Chipping Sparrow (Spizella passerina arisonae). Rare 

 summer resident along the Little Missouri. Quite numerous 

 in the Slim Buttes during the last half of August. 



Clay-colored Sparrow (Spizella pallida). Seen once in July on 

 the plains. 



Western Field Sparrow (SpizeUa pusilla arenacea). Not un- 

 common on the foothills of the higher buttes, where suitable 

 situations occur copses and grass. Occasional elsewhere. 



White-winged Junco (Junco aikeni). Common nester in the 

 Short and Long Pine Hills. Fledgelings observed July 20 

 in the Long Pines. 



Dakota Song Sparrow (Melospiza melodia Juddi). Nests in each 



of the suitable localities about the buttes. Quite common as 



a migrant after August 21. 

 Lincoln's Sparrow (Melospiza lincolni lincolni). One collected 



September 7, 1912, in the East Short Pines. 

 Swamp Sparrow (Melospiza georgiana). One seen August 22 on 



the Moreau River. 



Arctic Towhee (Pipilo niaculatus) . Abundant breeder wherever 

 woods occur. 



Black-headed Grosbeak (Zamelodia melanocephala). Abundant 

 nester in those parts of the Little Missouri Valley which are 

 well filled with cottonwood groves. One was observed to 

 sing while flying, a song much resembling that of the West- 

 ern Mockingbird. 



