BIRDS OF COLORADO. 99 



breeding on the plains and in the lower portions of the mount- 

 ains. It seems to be most common during the summer on the 

 plains and in the lower valleys. Although it enters the 

 mountain parks and reaches 9,000-10,000 feet, it is not common 

 above 7,000 feet. The great bulk move north and south in 

 May and September, but their movements are quite irregular. 



530. Spinus psaltria. Arkansas Goldfinch. 



Summer resident; common. Comes as far north as the 

 northern boundary of Colorado and breeds throughout its range 

 in the State, on the plains and in the mountains to somewhat 

 over 9,000 feet. It is the latest migrant, scarcely reachi'ng 

 northern Colorado before the middle of June. Breeds from the 

 last of June to the middle of July. Nash found young at 

 Pueblo just leaving the nest September 18, 1879. Migrates 

 southward late in October and the first part of November. Is 

 found rather less than a hundred miles east of the mountains 

 out on the plains. Seems to be most common in central Colo- 

 rado. 



530a. Spinus psaltria arizons. Arizona Goldfinch. 



Summer resident; not common and either local or else has 

 not been separated by observers from typical psaltria. Brought 

 into the fauna of Colorado by a specimen in the Maxwell Col- 

 lection. In southwestern Colorado C. F. Morrison says that 

 psaltria and arizonce are about in even numbers and that after 

 the young of arisonce are out of the nest they go up into the 

 mountains and appear again in abundance in October, stay a 

 few weeks and retire south. A. W. Anthony writes that he has 

 specimens from Pueblo and Colorado Springs taken in the 

 breeding season. Prof. Wm. Osburn writes that he has two 

 specimens he took at IvOveland in the breeding season and that 

 he also found them breeding at Golden. They can therefore be 

 said to breed from the plains to 6,000 feet. 



533. Spinus pinus. Pine Siskin. 



Resident; common. During migration this species is very 

 abundant along the foothills. Retires; to the mountains to 

 breed, ranging in the summer from about 7,000 feet to timber- 

 line. Occasionally a few nest at the base of the foothills. 

 Some remain through the winter, but a little below timber-line, 

 while the bulk are scattered over the lower valleys and through- 

 out the plains. 



000. Passer domesticus. European House Sparrow. 



Resident; not yet abundant anywhere. This imported 

 pest reached Colorado only .a few years ago. W. P. Lowe 

 noticed its arrival at Pueblo in February, 1895. (Nidologist, II. 



