46 



HERPETOLOGY OF MICHIGAN. 



tirelv terrestrial in its habits. It is iiuable to oliinb trees because 

 of the extreme smallness of the disks on its lingers and toes, and its 

 agility and ability to accomplish rapid changes in coloration are 

 probably its principal protection from enemies. It is nsnally found 



DOMINION OF CANADA 



I L L I N IS 



-W ERIE 



Fig. 13. Distribution of Acris gryllus. 

 Horizontal ruling, specimens examined: vertical ruling, reports only. 



in large numbers along the banks of streams or ponds. When dis- 

 turbed it jumps into the water with a series of high leaps and 

 buries itself in the mud, from which it soon emerges. This species 

 liibernates during the cold weather but soon becomes active again 

 during warm ])eriods. The food consists of small insects. These 

 frogs sing in cliorus during the months of April and May and the 



