Family CRICETIDAE 



157 



Little is known about the life history of the harvest mouse 

 in Illinois. In some other states, this species is known to build 

 a globular nest in dense grasses or weeds, rather than under 

 logs or below the surface of the ground. It feeds on seeds, is a 

 good climber, and frequently crawls far up into plants in search 

 of food. Breeding begins in the spring. Young may appear by 

 late April and when 3 weeks old are able to feed by them- 

 selves. 



Fig. 88. — Known distribution, in the United States, of some mice 

 with a limited range in Illinois. 



