568 Colorado College Publication 



part of October, the earliest date near Colorado Spring being 

 October 20, 1911, and the last spring date being April 11, 

 1882, by Allen and Brewster, probably most of them are gone 

 by April first. 



Possibly this and the other Juncos go to the higher ele- 

 vations on their first arrival in fall, for Lloyd Shaw reported 

 seeing them in Jones Park, 9,000 feet, October 1, 1911. 



This species' varies considerably in abundance during 

 dififerent years, and some seasons it is not at all plenty ; the 

 winter of 1912-13 seemed to be an example of this. On the 

 other hand the winter of 1909-10 it was unusually numerous ; 

 near Austin's Bluffs there seemed to be three times as many 

 of this as of /. mearnsi as shown by speciments shot indis- 

 criminately and field notes made at the time. The species 

 seems to prefer the foothills and bulffs, and to keep away 

 from the valley streams. It was found at Lake Moraine 

 March 8 and 9, 1906. The first specimens of this species 

 known to science were discovered by Aiken in Barnes's Canon 

 in December, 1871. 



Junco hyemalis hyemalis. Slate-colored Junco. 



Winter visitor, not common. Probably arrives and de- 

 parts at the same time as the other Juncos. The latest spring 

 date is April 25, 1899. 



The rarest of our Juncos in winter but during a short 

 period of autumn and spring migration quite common, some- 

 times in large flocks. 



Junco hyemalis connectens. Intermediate Junco. 



Winter resident; not common. Times of arrival lud 

 departure no (Joubt the same as the other Juncos. 



About as common as hyemalis, shufeldti, and montanus, 

 much more common in migration than in winter. 



