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 reaching 
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 arizonae. 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 arizoncs are about in even numbers and that after 
the young of arizoncE 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 Loveland 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. 
