270 



ANIMAL LIFE 



FIG. 164. Nest of the Calif ornian bush -tit (Psaltrlparus minimus). Photograph by 

 G. O. SNYDER, Stanford University, California. 



leries. The prairie-dogs make burrows in groups, forming 

 large villages. 



The devotion to their young displayed by birds and 

 mammals is familiar to us. The parents will often risk or 



