THE GRAY MARMOT 



209 



strongly differentiated by its light, grizzly-gray color, with 

 certain dark markings. It is found from the Columbia River 

 northward to about 63° North Latitude and eastward to 

 Hudson Bay. It derives one of its names from the fact 



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WOODCHUCK. 



that its alarm cry consists of a shrill whistle, which is re- 

 peated by the various members of the colony threatened 

 with danger. Often it is found in rocky mountain valleys, 

 high up, with the pika as its nearest neighbor. 



The Yellow-Bellied Marmot, 1 easily distinguished by 

 the bright-red hair on its under-parts, is a Southern species, 



' Mar-mo'ta flav'i-ven-tcr. 



