202 THE MIGRATIONS OF BIRDS 



but from the little that we know at present, it ap- 

 pears that flocks wander to a considerable extent, 

 since Venturi, at the point last mentioned, records 

 a sudden increase in abundance about the first of 

 January. In its southern home the bobolink is 

 known to European settlers as charlatan from the 

 pied dress of the male in breeding plumage, and 

 many are captured in northern Argentina by bird- 

 catchers who sell them throughout the country. I 

 saw them offered in several Argentine cities and 

 have known of their shipment across the mountains 

 to Chile. In 1925 one that had been purchased in 

 Valparaiso was brought to the National Zoological 

 Park, in Washington. 



Harris's sparrow (Zonotrichia querula), a species 

 allied to the white-crowned and white-throated 

 sparrows, but of larger size, with throat marked with 

 black, is an excellent example of a species with 

 limited distribution and migration. In summer it 

 nests in a more or less unknown region in Hud- 

 sonian Zone, from Fort Churchill on Hudson's Bay 

 westward, possibly to near Great Bear Lake. In 

 September and early October it migrates south to a 

 wintering ground from northern Kansas south to 

 northern Texas. Migration is almost directly south 

 and extends only through a comparatively narrow 

 area along the eastern edge of the Great Plains. 

 Stragglers come to eastern Colorado on the west 



