256 GENERAL ZOOLOGY 



branes, is also quite common (Fig. 98). The largest and 

 most aquatic species are the bull-frogs; some individuals 

 attain a body length of seven or eight inches. The wood 

 frogs are adapted to terrestrial life, and may spend a large 

 part of the year at considerable distances from water. 



The tree-frogs (C) usually live among vegetation. They 

 have sucking discs at the tips of the toes, which enable 

 them to climb with ease. They also possess remarkable 

 ability to change their colors to match the surroundings. 

 The little brown cricket frog of the United States is a 

 degenerate among tree-frogs which spends most of its 

 life in or near the water and has only rudimentary discs 

 at the ends of its toes. A very specialized tree-frog in 

 Java is able to sail from tree to tree by using the spread 

 webs between the toes. It does not go to ponds to breed, 

 but makes a suspended nest inside a rolled leaf. 



