1913J Grinnell-Swarth: Birds and Mammals of San Jacinto 237 



gonio base of the mountains, at points in Hemet Valley, on Santa 

 Rosa Mountain, at Deep Canon, at Vallevista, and one bird, on 

 July 7, quite fittingly circling over the very summit of San 

 Jacinto Peak. 



A nest was found May 20 in a narrow, rocky canon near 

 Cabezon. It was placed on a small ledge projecting from an 

 almost perpendicular cliff, about 150 feet from the bottom of 

 the canon. The structural material was sticks and twins solely. 

 large, heavy branches in the outer walls (greasewood branches 

 three feet Ion-: being distinguished), and smaller twigs interiorly, 

 the whole mass being about four feet in diameter and from two 

 to three feet thick. The single young bird it contained (no. 

 2134), much too small to fly, was fairly well covered with 

 feathers, but with the natal down projecting between the feather 

 tracts. 



But one of the parent birds was seen, circling far overhead, 

 and never venturing very near. In the nest were the frag- 

 mentary remains of a skunk (Mephitis). 



About the camps at Snow Creek, Cabezon and Banning, eagles 

 were seen daily, but it is probable that the Cabezon pair covered 

 at least this much territory in their foraging, so that the same 

 birds may have been seen over and over again. 



On Santa Rosa Mountain. June 28 and on several subsequent 

 occasions, two full-grown young and their parents were seen 

 circling about, or sitting in the three tops. In all probability 

 the young had been hatched somewhere in the vicinity. 



Falco mexicanus Schlegel 



Prairie Falcon 



Observed only on the desert side of the range, single birds 



being seen at Dos Palmos, on May 27, at the mouth of Palm 



Canon, June 15. and at Black Hill (near Dos Palmos), June 18. 



The species probably breeds in the region. 



Falco peregrinus anatum Bonaparte 



Duck Hawk 

 Encountered on three occasions. On June 2 one was seen 

 passing swiftly overhead on the trail a few miles east of Van- 

 deventer Flat, at close enough range for us to determine with 



