89 



60. Haliaeetus leucocephalus leucocephalus. Bald Eagle. 



— ''One seen twice, or else two individuals, on the 

 upper Hardy River. Stated to be very rare by our 

 Indian guide" (Rhoads). 



61. Falco sparverius phalaena. Desert Sparrow Hawk. — 



Seen but once — on the western slopes of Pattie Basin, 

 April 9. 



Rhoads obtained specimens along the Hardy. 



62. Polyborus cheriway. Audubon's Caracara. — ''Only 



two seen on the upper Hardy" (Rhoads). 



63. Pandion haliaetus carolinensis. Osprey. — "Seen only 



at Mount Major" (Rhoads). 



64. Aluco pratincola. Barn Owl. — "One seen above the 



Colony" (Rhoads). 



The "Colony" is a locality on the eastern side of 

 the delta, the most southerly point at which the old, 

 now abandoned bed of the Colorado River cuts the 

 Sonoran Mesa. 



65. Asio flammeus- Short-eared Owl. — "A few seen near 



the mouth of the Hardy" (Rhoads). 



66. Otus asio cineraceus. Mexican Screech Owl. — 



"Heard several times" (Rhoads). 



67. Bubo virginianus pallescens. Western Horned Owl. 



— Rhoads found this species abundant, and nesting at 

 the time of his visit. Two specimens were col- 

 lected. 



68. Speotyto cunicularia hypogaea. Burrowing Owl. — Not 



uncommon along the dry cuts of the New River, south 

 of Mexicali, and in the creosote and mesquite tracts 

 between the boundary line and the Cerro Prieto 

 (Black Butte). I rode my horse almost over two or 

 three as they stood on the ground watching me. 

 One was seen perching on the top of a dead mesquite 

 on the afternoon of March 29, and I shot a breeding 

 male in flight at noon of April 19. 



We saw no trace of Burrowing Owls between 

 Hardy's Colorado and the Cocopahs, or in Pattie 

 Basin. The species was not observed by Rhoads. 



