SOUTHERN ARIZONA 217 



from inroads of enemies by the sharp points of the 

 leaves themselves. 



Now it happened that, in connection with my 

 business, machinery was employed, to clean which, 

 and to wipe away the oil, cotton waste was used. 

 This waste was thrown away with other refuse 

 not far from the house. In the spring succeeding 

 our settling here, the orioles discovered bunches 

 of this waste, and in at least two cases abandoned 

 their former and almost invariable method of 

 nesting in the yucca, and built conventional oriole 

 nests in the oak trees. This is dwelt upon as 

 evidence of the changes brought about by immi- 

 gration into a new country in the habits of the 

 wild animals which live there, without any inten- 

 tion on the part of the settlers. 



In this remote canon we were able to have a 

 number of dogs and other pets without annoying 

 or disturbing our neighbors. Grouse was pre- 

 eminent, and as companions of his own kind 

 there was Bull, a coarse-bred mastiff, two or three 

 mongrel black and tan terriers, and a varied 

 assortment of nondescripts, aggregating some 

 twelve dogs. 



A red-tailed hawk taken from a nest in the 

 vicinity of Tucson was now a year old. " Peep " 

 had never known captivity ; that is, he had never 

 been in a cage or enclosure. Usually he was 

 allowed to roam free, and when confined, was 



