2IO UNIVERSITY OF COLORADO STUDIES 



Junco hyemalis connectens, Shufeldt's Junco (5676) 



Winter resident; common in the Plains and Yellow Pine zones. Arrives, 

 October 1-2 1 (4 records); leaves, April 2-6 (2 records). 



Junco hyemalis montanus, Montana Junco (567/) 



There is one specimen in the University collection taken near Boulder, January 

 18, 1904. Felger has two taken by Gale but without data (Henderson). There 

 is not enough difference between the specimen in the University collection and 

 specimens of the common form mearnsi to serve as a guide for field identification, 

 and montanus might easily have been overlooked. 



Junco hyemalis mearnsi, Pink-sided Junco (s67g) 



Winter resident; abundant on the Plains and common in the Yellow Pine 

 zone. Arrives, September 14 — October 7 (3 records); leaves, April 9-28 (2 

 records). A few birds were observed at timberline on September 3, 1910, sug- 

 gestive of a migration route along the range. Gale noted birds at 10,000 feet 

 in April, and it seems likely that all the Juncos occur in migration in the higher 

 zones of the mountains. The winter flocks are of mixed species, the four forms 

 often being present in the same band. The Pink-sided are the most numerous and 

 the Gray-headed the least so, while the White-winged seem more partial to the 

 Yellow Pine areas than the others. 



Junco hyemalis anneclens, Ridgway's Junco (567A) 



A specimen was taken by McGregor near Boulder on November 25, 1892. 

 The "subspecies" was pronounced a hybrid by Ridgway {Birds of North and 

 Middle America, Part I), J. p. caniceps X /. h. mearnsi. 



Junco phaeonotus caniceps, Gray-headed Junco (5706) 



Permanent resident; in summer, infrequent in the Yellow Pine and common 

 in the Mountain zone. In mid-winter rather infrequent along the edge of the 

 Plains and Yellow Pine zones. Arrives on the Plains, October 1-13 (4 records); 

 Gale noted them in the Mountain zone, March 23. Eggs have been found between 

 May 23 and July 10 at 7,500 to 10,500 feet. Birds have been noted at timberline 

 in July. 



Amphispiza nevadensis nevadensis, Sage Sparrow (574. 1) 



One was taken at Left Hand by Dille, March 18, 1904. This is the only 

 record for the northern part of the state. 



Melospiza melodia montana, Mountain Song Sparrow (5816) 



Permanent resident; common in summer in the marshes of the Plains and 

 infrequent in the parks of the Yellow Pine and lower part of the Mountain zone 

 (9,000 feet at Tolland). Common in winter in the bottomlands on the Plains. 



