504 Colorado College Publication 



An immature bird was brought to Aiken, which was killed 

 at Buttes, January 10, 1910. The last full plumaged birds 

 which were killed in the County were killed in 1904 and 1905, 

 at the base of Cheyenne Mountain. Both were shot from 

 the same tree by the same man, who had observed in the first 

 mentioned year that the bird was in the habit of perching every 

 day in the same pine tree. He had a blind nearly, went there 

 before daylight, and killed the bird when it came. The follow- 

 ing year he secured the second bird in the same way, from 

 the same tree. 



Falco mexicanus. Prairie Falcon. "Bullet Hawk." 



"Swift." 



Summer resident, common. Arrives in April. 



Breeds about rocky places, and a pair was known by Aiken 

 to have nested in the rocks of the Garden of the Gods in 1874. 

 Young birds are common in July and August. Seems to be 

 confined to the plains region. 



Falco peregrinus anatum. Duck Hawk. 



Rare summer resident, and not common even in migration. 



This hawk has been known to breed in the rocks at the 

 Garden of the Gods, where Allen noted it in 1871. Aiken's 

 attention was called to their presence in the place by Minot, 

 in 1879, and he secured a specimen there shortly afterward, 

 and also collected one there in 1884. One killed near Peyton 

 in July, 1912., is now in the Aiken Collection at Colorado Col- 

 lege, as are also the two specimens previously mentioned. 



Falco columbarius columbarius. Pigeon Hawk. 



Winter resident, not uncommon. Has been seen as early 

 as September 21, and as late as May 7. 



Pigeon Hawks sometimes come right into the heart of 

 Colorado Springs, possibly attracted by an abundant food 



