366 University of California Publications in Zoology. [Vol. 7 



threatening manner. The nest was more closely investigated on 

 the following day, when one adult bird only was seen in the 

 vicinity, and the juvenals had apparently forsaken the nest. 



Two examples of the species (nos. 9315 and 9316) were pre- 

 served. 



Falco sparverius phalaena (Lesson) 

 Desert Sparrow Hawk 



Distribution. — Occurred in small numbers almost everywhere 

 along our route, its zonal range being Upper Sonoran to the 

 highest Transition. 



Habits. — Sparrow hawks were noted in the mountains, perch- 

 ing like lonely sentinels on limber pines, quaking aspens and 

 convenient boulders. Two fully fledged juvenals were noted on 

 July 17 in a grove of aspens near Alder Creek Ranch. On 

 July 19 a family of adults and juvenals was observed flying 

 about the cliffs of Little High Rock Canon, Washoe County. 



Four examples of the species (nos. 9083-9086) were preserved. 



Asio wUsonianus (Lesson) 



Long-eared Owl 



A solitary owl of this species was noted at 7 :30 p.m. on the 

 evening of August 1, on the Duffer Peak Meadow. He was 

 maintaining a lookout from a horizontal branch of a dead limber 

 pine,- and was calling at intervals with notes which sounded 

 dismal and lugubrious. His stomach proved to be empty. This 

 individual (no. 9189) was the only one observed. 



Bubo virginianus pallescens Stone ( ?) 



Western Horned Owl 



A horned owl, presumably of this species was heard "whoo- 

 ing" about midnight on July 9. At this time we were encamped 

 at an altitude of 7000 feet on Big Creek. The sound seemed to 

 come from the rocks of a nearby butte. A second individual 

 was flushed from an aspen on Alder Creek at 6000 feet altitude. 

 On taking wing it was pursued some distance by a western 

 .warbling vireo. It disappeared in a grove of aspens up the 



