The Red-Tailed Hawk 33 



without motion of the wings, until they were almost out of 

 sight in the azure blue of the sky. Others have seen them do 

 this and have reported that when they had reached their high- 

 est flight, like a night hawk, they would suddenly drop downward 

 until near the earth and then resume their ordinary flight, but 

 I have never seen this done. This hawk does not sing, nor do 

 I know of any species of hawk that does. Their principal call 

 note, generally uttered during their aerial gyrations, consists of 

 a shrill far-reaching "ke-ah" repeated at short intervals. In- 

 deed, the red-tail may be called a screamer. 



