i886.] Scott on the Birds of Arizona. 423 



62. Buteo abbreviatus. Zone-tailed Hawk.— This species has beeiv 

 so fully discussed by Dr. Mearns in a recent number of this journal (Auk 

 II, pp. 63-69, January, 18S6) that it will suffice to say that I have met with 

 it at all the points where I have collected, that I have records of its breed- 

 ing throughout the region, generally in April, and that in the San Pedro 

 region and about Tucson it is apparently strictly migratory. 



On two occasions I have seen from the railroad, while passing through 

 the country between Casa Grande and Bowie stations, flocks of at least 

 fifty birds of this species, evidently migrating and closely associated to- 

 gether. This was in the early part of September, 1882, and as the train 

 was going very slowly, and I was close to the birds, and had become very 

 familiar with them in life about Riverside in the months just preceding, 

 I could be very certain of my identification. 



63. Buteo swainsoni. Swainson's Hawk. — Only met'with in the im- 

 mediate vicinity of Tucson where, during the warmer portion of the year, 

 it is common. I have seen flocks of this species congregated together, 

 evidently migrating, in September. This was on the plain just outside of 

 Tucson about the middle of September, 1S82. 



64. Asturina plagiata. Mexican Goshawk. — Mr. Brown tells me 

 this species is not uncommon in the spring and during the breeding sea- 

 son in the vicinity of Tucson. I have not met with it at other points, but 

 saw the species on a few occasions while driving in the neighborhood of 

 Tucson in May, 1883. 



65. Aquila chrysaetos. Golden Eagle. — Common resident through- 

 out the region at an altitude above 4000 feet. I have seen the birds 

 carrying material for nest building early in December and noted them 

 mating at about the same time. The birds were among those I saw almost 

 daily throughout the year near my house in the Catalina Range. 



66. Falco mexicanus. Prairie Falcon. — A rather common resident 

 on the plains throughout the region. 



67. (.?) Falco columbarius. Pigeon Hawk. — A small Falcon, seen 

 several times at a considerable distance in the pine region of the Catalinas, 

 I can only refer to this species. 



68. Falco sparverius. Sparrow Hawk. — Resident and common up 

 to an altitude of 5000 feet at all the points visited, but rarely seen above 

 that elevation. It breeds commonly in deserted Woodpecker holes in the 

 giant cacti wherever they flourish, nesting in late April and May. 



69. Polyborus cheriway. Audubon's Caracara.; — Rather common 

 about Tucson during the warmer portion of the year, and a few are appar- 

 ently resident. I have no records of the species from other points. 



70. Pandion haliaetus carolinensis. American Osprey. — Not un- 

 common along the larger water courses, but I have no records of it in 

 winter, nor of its breeding. 



71. Strix pratincola. Barn Owl. — Taken on three occasions near 

 Tucson, which are the only records I have of the species. 



72. Megascops asio trichopsis. Mexican Screech Owl. — Common 

 resident and breeds about Tucson in April and early May. Also taken at 



