2TO 



ANIMAL LIFE 



FIG. 164. Nest of the Californian bnsh-tit (Psaltriparus minimus). Photograph by 

 G. O. SNYDEK, 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 



