14 ANIMAL LIFE IN THE YO SEMITE 



Table of Occurrence, According to Life Zone, of the Mammals, 



Breeding Birds, Eeptiles, and Amphibians of 



THE Yosemite Section 



Note. — It is intended, in the using of this table, that comparison be 

 made with the life-zone map and profile, plates 61, 62. Width of bar 

 indicates relative abundance of the species concerned ; in other words, 

 the widest place in the bar indicates the place, zonally, where the popula- 

 tion is believed to be densest. In case there is some reason to suppose 

 that a species ranges beyond what is shown by the actual facts at hand, 

 such extension is indicated by a broken line. Some of the species which 

 are listed in the present work are omitted from the table because they are 

 non-native, extinct, or of unknown or doubtful status. Water birds are 

 omitted entirely, as are also non-breeding land birds. 



It must be distinctly understood that this table of zonal distribution 

 is based on our findings in the Yosemite region only ; it must not be inter- 

 preted as setting forth the distributional situation in the Sierra Nevada 

 generally, or in the State at large, though this may approximately be true 

 in the great majority of cases. The zonal diagnoses of species apply 

 primarily to the long, western slope of the Sierra Nevada; many of the 

 species occur only on that side. Exclusively east-side species are so indi- 

 cated by foot-note reference; and where these latter are known to extend 

 into the Transition Zone from the Upper Sonoran Zone (hence bej^ond 

 the limits of our section) this fact is indicated by cutting off the bar 

 squarely at the vertical line of demarcation between these two zones. 



