792 ANIMALS AND THEIR ENVIRONMENT 



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Figure 38.9. Two types of desert in western North America, a "cool" desert in 

 Idaho dominated by sagebrush (above) and (below) a rather luxuriant "hot" desert in 

 Arizona, with giant cactus (Saguaro) and palo verde trees, in addition to creosote 

 bushes and other desert shrubs. In extensive areas of desert country the desert shrubs 

 alone dot the landscape. (Upper photograph by U. S. Forest Service, lower by U. S. 

 Soil Conservation Service.) 



