-6- 



belonging disttnotly to the forest oommunlty. The white pine 

 weevil, wo 0(3 frog, pileated woodpecker and the beaver may be assigned 

 to this class. Other forms are occasional visitors as the toad, 

 grackle and cotton-tail rabbit, while still others rarely or never 

 enter the forest, in which class may be cited the meadow lark and 

 woodchuck. All degrees of gradation between these broad classes 

 may be found, and there may also be variation in the habits of the 

 individuals in any class. 



it is difficult, if not impossible, in our present state of 

 ecological knowledge, to see or appreciate all the conditions which 

 attract the various forms of life to any community- In the forest, 

 however, certain influences of the trees have been determined, or 

 are obvious, of which the protection provided by the forest cover 

 against sun, wind and rain is perhaps the most Important to the 

 forest community. I'he temperature In the forest Is also moderated 

 to Some extent, depending on the location, type and composition of 

 the forest cover. To the wild life the trees may further provide 

 a measure of protection against enemies, and a supply of food. This 

 may come directly from the trees, as seeds, nuts, lark* or leaves, or 

 Indirectly, by the attraction to the forest of animals which serve 

 as food. 



Hvery mamber of the forest community has some direct or In- 

 direct Influence on every other member, so that the wild llffe In 

 turn, has certain Influences on the forest trees, either beneficial 

 or harmful. These Influences are but little understood, except In 

 a few cases and In a general way, but It Is recognized that there 



